It is also possible to supply steam, then the surface will be moistened at the same time. What kind of documentation is maintained (concrete care log, sample filling) When performing construction work, the quality of which determines the reliability of the design, each stage must be documented. In our case, this is a magazine on concrete care; you can download it freely online. It is stitched and sealed, and each entry in it is confirmed by signatures. Let's look at an example of filling by columns.
- this is the name of the design;
- volume of laid mixture;
- surface modulus - the ratio of the surface area of a structure to its volume;
- aging methods - regular heating, thermos method, etc.
Let's get acquainted with the concrete work log and learn how to fill it out
Attention
As-built documentation in construction Journals Forms Lists Examples Certificates Home page\Examples\Example of filling out a journal concrete works Construction Plant for the production of glass containers CJSC "Megapolis" Object Pumping station fire extinguishing works Manufacturers: Ch. engineer LLC "Empire" Asadov Y.M. Laboratory assistant: Ch. engineer LLC "Empire" Asadov Y.M. Year 2009 Started 10/17/2009 Finished 10/20/2009 Concreting date Name.
concrete parts of the assembly and design elements (with indication of coordinates of axes and marks) Concrete grade Composition concrete mixture and w/c ratio Type and activity of cement Cone slump t concrete. mixtures at the exit from bet. mixer t concrete. mixtures during placement Volume of concrete placed. per shift Compaction method bet. mixture (vibrator type) t air Atm. precipitation, etc. Marking control.
How to care for concrete and design a magazine
Important
It is worth noting that there are several methods of heat treatment of reinforced concrete structures: thermos, electrode heating, heating in heating formwork, infrared heating, induction heating and heating with heating wires. Paragraphs 8-13. Filled out by a representative of the construction laboratory or the work contractor based on the conclusions provided by the laboratory.
Upon delivery and acceptance of a completed facility into operation, the concrete work log, if necessary, is presented to the working commission, and upon completion of acceptance it is transferred for storage to the developer or, on his behalf, to the operating organization. As you can see, the process of filling out a concrete work log is not complicated, and if you still have questions, feel free to ask them in the comments, and we will try to answer them promptly.
Concrete work log
- Date and time when installation began;
- date and time of start of aging;
- holding period (not in days, but in hours);
- outside air temperature;
- average holding temperature;
- date and time of temperature measurements at several points (wells) in the volume;
- penultimate column: signature of the person who carried out the measurements;
- At the end there is a column for notes. A correctly filled out concrete care log allows you to determine the cause of defects in most cases. ready-made structures- are they caused low-quality materials, improper concreting or formed during the hardening process. Therefore, its maintenance is no less important than the execution of hidden work reports and the availability of quality certificates for the components of the mixture.
Concrete Maintenance Journal. form n f-55
Also, corrections and blots are not allowed. It is included in the list of as-built documentation and, upon completion of construction, is transferred to the developer, and then to the operating organization. If concrete work is carried out at an outside air temperature of less than +5°C, especially in winter time, then it will be necessary to keep a concrete maintenance log.
Info
We will talk about it in the following articles. P.s If you have any questions, feel free to ask them in the comments, and I will try to answer them. Subscribe to the blog and be the first to receive new articles.
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- SP_70_13330_2012 Updated edition of SNiP “Load-bearing and enclosing structures”.
Concrete care log
Now let's look at filling out the table. The first seven columns are filled in at the construction site during the process of concreting the structures. The work contractor is responsible for correctly filling out these fields.
Columns 8 to 13 are filled out by a representative of a construction laboratory that tests concrete structures for strength. Or, based on data from the construction laboratory, these columns can be filled out by the work contractor.
One way or another, the representative of the construction laboratory and the work contractor put their signature in paragraph 14, which is designed to ensure the accuracy of the data they provide. And so, let’s go through each point in more detail: Point 1.
We enter data about the date and time of concreting. Point 2. In accordance with the design documentation, we indicate the name of the concrete structure and its location (building axes, elevation).
How to fill out a concrete maintenance log
The start of curing of concrete is the start time of the coolant when artificially heating the concrete, or the time of completion of concreting the structure using the “thermos” method. 2. Termination of coolant start-up and demoulding of the structure is marked in the log with symbols.
3. Upon completion of the journal, it is handed over to the production and technical department, which makes a note of acceptance in the table. 4 general work logs.
How to fill out a concrete maintenance log
Strength of concrete and iron concrete structures depends not only on the quality of the mixture and the correct execution of the installation work, but also on the conditions under which it hardened. We'll tell you how to care for concrete, touching on the issue of paperwork.
Additionally, consider a concrete care log for an example of filling. What processes occur during concrete hardening During hardening, the water that was used for mixing reacts with the substances that make up the cement.
As a result, a durable cement stone is formed. This process is quite lengthy, the material gains brand strength after 28 days, but hardening does not end there; some reactions with sufficient moisture can take much longer. But since this indicator is taken in all calculations, it is important to ensure optimal conditions hardening during this period.
How to fill out a concrete maintenance log correctly
Test results control samples Date of stripping of this part of the structure Note When stripping, 28 days. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 10/17/2009 Concrete preparation for foundations high-grade A-D/6-8 BSG V7.5 P2 F35 W2 supplier Beton LLC PC400 5-9 cm 20°C 18°C 6 m3 deep 15ºC no No. 1, No. 2 - 110 105 10.19. 2009 10.20.2009 Foundations Fm1 v/o A-D/6-8 from elevation -1.800 to elevation -0.300 BSG V15 P2 F100 W4 supplier LLC Beton PC500 5-9 cm 20°C 18°C 24 m3 deep 16ºС no No. 3, No. 4 — 234 211 10/28/2009 ……… ……… ……… ……… ……… ……… ……… ……… ……… ……… ……… ……… ……… … …… ……… ……… ……… ……… The magazine has 10 (ten)_ pages numbered and laced “01” October 2009.
Director of Empire LLC Tankeev A.Yu.
An example of filling out a concrete care log
Approved by the Order of Rosavtodor dated May 23, 2002 N IS-478-r Form F-55 Contracting organization Construction (reconstruction) (name and location, km, PC) MAGAZINE N CONCRETE CARE Started » » 20
Finished » » 20. The pages are laced and numbered in the magazine. Section head (last name, initials, signature) (senior foreman) (last name, initials, signature) T T T T T ¬ ¦Name-¦About-¦Module ¦Method ¦Date and time ¦ Beginning of curing¦ ¦moving¦em¦on the surface-¦curing-¦the end of the compacted-¦concrete¦ ¦pre-concrete- ¦pre- ¦ness, ¦live- ¦fixing the concrete ¦¦ ¦united-¦tone¦sq.
m/ ¦nia+ T + T T + ¦hour-¦¦cub.
But for large structures this is impossible to implement. Usually, they simply water the surfaces under a slight pressure so as not to damage or moisten the material with which they are covered. Measures for winter concreting It is not advisable to carry out concrete work in the summer, but this does not always work out. Concreting in cold weather requires the use of special technologies- for example, they introduce into the mixture antifreeze additives reducing the temperature at which ice crystals form. Caring for concrete summer time differs from such work in winter, when special measures are taken to ensure normal hardening. Here are examples of caring for poured concrete in winter.
- The formwork is insulated.
The concrete work log RD-11-02-2006 documents the progress of the work process at any construction site where concreting is being carried out. Since the journal relates to as-built construction documentation, its content and maintenance is regulated by the Guiding Document RD-11-02-2006. The presence and correct maintenance of a journal is strictly necessary.
The importance of having information about concreting documented during the work is explained by the impossibility of subsequently checking their quality without destroying the structure. Pouring concrete is a critical stage. If during the work there were violations and the requirements were not met building codes, then the consequences may be unpredictable.
The concrete work log contains important information about the object, located on the title page. TO key points may include the availability of information about the person responsible for the availability, maintenance and safety of the document. Due to the length of the construction (reconstruction) process, it is possible that the employee responsible for the log may change. This fact must be reflected on the title page.
The pages intended for entering operational information have a tabular format. The tables are divided into 15 columns, each of which contains its own set of information. Book spread of the magazine.
The concrete work log form contains the following columns for entering data about the concrete pouring process:
- Date of concreting shift (from-to)
- Name of the concreted part of the structure and structural elements. Sketch of the concreted part of the structure with marks at the beginning and end of the shift
- Compressive strength class of concrete
- Concrete mixture composition and water-cement ratio, concrete composition selection card no.
- Type and activity of cement
- Mobility of concrete mixture
- Temperature of the mixture during installation
- Volume of concrete placed in the case (per shift)
- Outdoor air temperature during concreting. Presence of precipitation
- Marking of control samples of concrete and their number, number of the act on the production of control samples
- Signatures of the foreman, shift foremen and laboratory assistant
- Test results of control samples/during stripping
- Test results of control samples/after 28 days
- Date of stripping
- Notes
The form arrives at the site only after the title information has been filled out and certified with all the necessary signatures and seals. Performs these operations by the developer's technical department. The document is being stitched. This eliminates the possibility of fraud with records (withdrawal or substitution of sheets).
The log is kept on site for the entire period of work. At this time, prompt data entry is performed. To obtain an opinion from state supervisory authorities on the object’s compliance with established standards and requirements, the form, along with other documentation, is submitted for verification. At the end of the verification activities, the document is returned and stored with the developer’s organization or with the customer on an ongoing basis.
Buy a magazine for concrete work in Moscow in the City Blank store
A blank, unfilled form can be purchased from our store. The magazine is printed in the City Blank printing house. Our warehouse always stores a certain number of standard finished products. This reduces the waiting time for an order and allows you to quickly receive the document in your hands. When ordering large quantities, production times are negotiated privately.
The form of the concrete work journal produced in our printing house can have different volumes, which is due to the possibility of choosing the number of internal pages. Possible entry additional information, for example, a company logo. A non-standard product is quickly printed in accordance with the customer’s wishes.
Check out the set additional options. All magazine forms can be ordered in hardcover. The cardboard cover can be laminated. The sheets of the form are numbered and stitched.
Instructions for filling out the Concrete Work Log (RD-11-02-2006):
- The magazine is issued by the production and technical department of construction with a completed title page
- A log is kept for each construction project
- When constructing small artificial structures, it is allowed to keep a log for a group of structures, be sure to highlight each structure
- When receiving concrete from the central concrete plant, entries in columns 3 and 7 are entered according to the data from the invoice indicating its number
- Columns 8 and 9 are filled in only when working in winter conditions
- Temperature measurements of concrete during curing are recorded in a special temperature control log
- The marks on the sketch show absolute marks adopted in the project
During the production of concrete work, in accordance with clause 3.5 of SP 70.13330.2012 “Load-bearing and enclosing structures”, all data relating to concreting must be entered into concrete work log.
If the construction site is under the control of state construction supervision, then concrete work log, according to paragraph 4 of RD-11-05-2007, is subject to registration with state construction supervision authorities. The developer or technical customer is responsible for transferring the log for registration, and the log itself must be transferred there no later than 7 working days before the start of work. Before submitting for registration, the magazine must be numbered, laced and filled with all necessary entries on the title page, and most importantly, sealed with the seal of the construction organization. Page numbering is placed at the bottom and right in the center. This is done so that there is free space on the right for subsequent continuous numbering of the complete set of as-built documentation. After registration, namely the seal of the state construction supervision and assignment of a registration number, the magazine is transferred to the construction site to those persons who directly carry out concreting. Filling out the concrete work log should be carried out every shift during the concreting process, and it should reflect the entire progress of the actual implementation of concrete work at the site.
The composition of the journal is determined by regulatory documentation - SP 70.13330.2012 “Load-bearing and enclosing structures” and includes a title page and a table consisting of 14 columns.
As noted earlier, you should first complete the cover page concrete work log. On the title page we assign a number to the magazine, enter information about the organization that performs the concrete work, the name of the object (must match the name specified in the design documentation or construction permit) and the address of the object. Next, we fill in the design data, such as the class of concrete for the compressive strength of structural elements, the total volume of concrete, the volume of unreinforced concrete, the volume of reinforced concrete. All this data can be found in the design (working) documentation. Lastly, we indicate the surname and initials of the work manufacturer who is responsible for concreting. Such responsibility must be confirmed by an order from the relevant organization.
An example of filling which can be found on this page, as noted earlier, consists of title page and tables. We have discussed the procedure for filling out the title page. Now let's look at filling out the table. The first seven columns are filled in at the construction site during the process of concreting the structures. The work contractor is responsible for correctly filling out these fields. Columns 8 to 13 are filled out by a representative of a construction laboratory that tests concrete structures for strength. Or, based on data from the construction laboratory, these columns can be filled out by the work contractor. One way or another, the representative of the construction laboratory and the work contractor put their signature in paragraph 14, which is designed to ensure the accuracy of the data they provide. So, let’s go through each point in more detail:
Point 1. We enter data about the date and time of concreting.
Point 2. In accordance with the design documentation, we indicate the name of the concrete structure and its location (building axes, elevation).
Point 3. We indicate the manufacturer of the concrete mixture. We take the data from the concrete mix passport.
Point 4. We indicate the designation (labeling) of the concrete mixture and the number of the quality document. Let's not forget that in symbol The concrete mixture includes not only the concrete class, for example, class B20, but also such indicators as frost resistance, for example, F100 and water resistance, for example, W6.
Point 5. We indicate the volume of the batch of concrete that was placed in the structure.
Point 6. We indicate the outside air temperature at which concreting was carried out.
Point 7. We indicate the method and mode of concrete hardening. There are three modes of concrete hardening: normal mode (natural temperature 15-20 ° C), heat treatment at normal pressure and autoclave processing. Since autoclave processing is possible only in factory conditions, this mode of concrete hardening should not be written in paragraph 7. It is worth noting that there are several methods of heat treatment of reinforced concrete structures: thermos, electrode heating, heating in heating formwork, infrared heating, induction heating and heating with heating wires.
Paragraphs 8-13. Filled out by a representative of the construction laboratory or the work contractor based on the conclusions provided by the laboratory.
Concrete care - methods, methods and documentation
Strength of concrete and reinforced concrete structures depends not only on the quality of the mixture and the correct execution of the installation work, but also on the conditions under which it hardened. We'll tell you how to care for concrete, touching on the issue of paperwork. Additionally, consider a concrete care log for an example of filling.
What processes occur during concrete hardening?
During hardening, the water that was used for mixing reacts with the substances that make up the cement. As a result, a durable cement stone is formed. This process is quite lengthy, the material gains brand strength after 28 days, but hardening does not end there; some reactions with sufficient moisture can take much longer. But since this indicator is taken into account in all calculations, it is important to ensure optimal hardening conditions during this period.
What is important for hardening to occur correctly?
Maintenance of concrete should allow it to withstand the following conditions:
- provide sufficient moisture;
- protect the product from mechanical damage;
- provide optimal temperature;
- prevent water from freezing, as ice crystals, expanding, disrupt the structure of the cement stone.
What regulates the care of concrete after pouring?
At the moment, in the construction industry, these works are regulated by the section “curing and maintenance of concrete” SNiP.03.01-87 “Load-bearing and enclosing structures”. It is small, three points, which define that:
- Optimal temperature and humidity conditions and protection from precipitation and moisture loss must be observed (a concrete care log helps control these conditions);
- Concrete maintenance must occur in accordance with the work production plan (WPP);
- the strength (1.5 MPa) is determined at which the movement of people and the installation of further tiers of formwork on the surface are allowed.
Conclusion - a correctly developed PPR, which includes the necessary measures, is very important.
Care measures
We list the most common measures when curing concrete structures:
- Water leaves primarily through surfaces, so it is necessary to protect them from wind and sun exposure. For this, film or damp cloth or tarpaulin is used. There are also special solutions to protect against drying out. As a last resort, you can fill it with shavings or sawdust, which also need to be moistened with sand. The shelter additionally provides protection of its surface from damage by precipitation (rain, hail).
- If concreting is carried out in the ground, then to protect against the filtration of water from the solution into the soil, it is necessary to provide waterproofing.
- To achieve optimal moisture content, concrete must be constantly moistened (most tips on how to care for concrete after pouring concern only this operation). The best option(this is how the hardening of the cubes for testing occurs) after two to three days, place the structure in water. But for large structures this is impossible to implement. Usually, the surfaces are simply shed under low pressure so as not to damage or moisten the material with which they are covered.
Measures for winter concreting
It is not advisable to carry out concrete work in the summer, but this does not always work out. Carrying out concreting in cold weather requires the use of special technologies - for example, antifreeze additives are introduced into the mixture to reduce the temperature at which ice crystals form. Caring for concrete in summer differs from such work in winter, when special measures are taken to ensure normal hardening. Here are examples of caring for poured concrete in winter.
- The formwork is insulated. Open surfaces are not only covered to reduce evaporation and protection from precipitation and sun, but also additionally insulated.
- Structures are heated in several ways - with external electric heaters or heat exchangers, with the help of infrared lamps or burners, or heating is carried out by passing current from special transformers through the reinforcing mesh.
- For moisturizing use only hot water.
- If this is possible, then a shelter or tent is installed around the structure, the internal volume of which is heated using air heat generators (guns) or another method. It is also possible to supply steam, then the surface will be moistened at the same time.
What kind of documentation is kept (concrete care log, sample filling)
When performing construction work, the quality of which determines the reliability of the structure, each stage must be documented. In our case, this is a magazine on concrete care; you can download it freely online. It is stitched and sealed, and each entry in it is confirmed by signatures. Let's look at an example of filling by columns.
- this is the name of the design;
- volume of laid mixture;
- surface modulus - the ratio of the surface area of a structure to its volume;
- aging methods - regular heating, thermos method, etc.;
- Date and time when installation began;
- date and time of start of aging;
- holding period (not in days, but in hours);
- outside air temperature;
- average holding temperature;
- date and time of temperature measurements at several points (wells) in the volume;
- penultimate column: signature of the person who carried out the measurements;
- At the end there is a column for notes.
A correctly filled out concrete care log allows, in most cases, to determine the cause of defects in finished structures - whether they are caused by poor-quality materials, improper concreting, or formed during the hardening process. Therefore, its maintenance is no less important than the execution of hidden work reports and the availability of quality certificates for the components of the mixture.
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