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1.The concrete raw material quality guarantees shifts
(1)The cement enters the arena when must have leaves the plant the test report list, and according to the cement brand, the marking, the variety, the manufacture date classification piles the code .
(2)The granulated substance, the stone material must carry on the investigation before the use, designated can guarantee the supply quantity, the supply quality supply goods the unit, and carries on the sample survey according to the standard request to its quality, every does not conform to the requirement, ceases enters the construction location .
(3)The water chemical analysis should (JTJ056-84) carry on according to "Highway engineering Water analysis Working instruction" .
(4)The sur- medicinal preparation should have the sur- medicinal preparation before the use the product examination certificate of quality and so on the pertinent data, the sur- medicinal preparation application should conform to "Concrete Sur- Medicinal preparation Application Technology standard" (GBJ119-88) the gauge .
2.Proportioning of cocrete design
Strictly carries on the mixture ratio design according to the mixture ratio design regulations, guarantees the coagulation material the measurement, the concrete mixes gathering stirs, the transportation, constructs and maintains. According to the intensity request accurately calculates the mixture ratio, and submits a report oversees engineer to examine and approve, after oversees engineer to agree only then uses, in the use process, must strictly according to the design mixture ratio execution .
3.Concrete raw material idea
Each coagulation material measurement result deviation, the cement mixes the material allowable deviation ±1%, is thick, the thin aggregate allowable deviation ±2%, water, sur- medicinal preparation allowable deviation ±1%. Should act according to the weather change determination aggregate in the construction process the moisture content, uses the water volume based on the examination result prompt adjustment. After irrigates the concrete, measures the appliance to be supposed the periodic inspection, the service, deposits in the room, in order to avoid damages .
4.Concrete stirring
The concrete mixes gathers the thing to be supposed the color to be consistent, must not have the segregation and the phenomenon. The concrete stirs the time should conform to "Concrete structure Project Construction And Approval Standard" stipulation. The scene sends the specialist (to experiment personnel) to stir the station surveillance inspection mixture ratio execution situation as well as the raw material, the test sample sample, the weighing weighing apparatus inspection calibration as well as mixes fashionably between whether tallies
5.The concrete constructs
The construction, the pipelining must be suitable straight, and levels. In constructs in the working procedure, should control the concrete the uniformity and the density. The concrete inspires when pounds takes shape, according to constructs the object and the concrete nature choice suitable vibrator, and the determination inspires pounds the time. In constructs and settles in the process, should take the measure to prevent produces the crack. When concrete, should manufacture the hoisting, Zhang La and qualified evaluates with the concrete test sample
6.The concrete structure raises
In maintains in the process, should control the concrete in to be advantageous in the temperature environment which grows to the hardening and the intensity. Should act according to constructs the object, the environment, the cement variety, the sur- medicinal preparation as well as adopts to the concrete performance requirement different maintains the method, the mass concrete should determine the concrete interior and the surface temperature causes the temperature control at in the design request scope, when non- design request, the temperature difference not suitably surpasses 20'C.

1. Concrete raw materials quality assurance
(1) approaching, the need for identification of cement single test report, a cement brand, labeling, varieties, identification date classification stacking. (2) sand, stone materials used in the previous survey to be undertaken, to ensure the supply of selected quantities, the supply of quality supply units, as a sample of their quality standards, which do not meet the requirements, to enter the site. (3) water chemical analysis should be the "highway water quality analysis operation procedures" (JTJ056-84). (4) The ratio should be in use before a certificate of inspection cover products relevant information ratio should be consistent with the application of the "concrete cover applications Standards" (GBJ119-88).
2。With more than two concrete design
Than in strict accordance with the design of a match than with the design demands, to ensure concrete measurement of the composition of materials, concrete mix from the mixing, transportation, construction and conservation. According to the intensity of demands for accurate calculation of the match than the demands and supervision engineers reported approval, supervision engineer consent before use, use process, designed to meet the stringent than implementation.

3。 Three concrete measurement of raw materials
Each plate concrete material composition measurement results deviations, cement mixing materials allow deviation +1%, rough, small deviations +2% allow
4 concrete mixing
Concrete mix material should colours unanimously, without segregation and secrete water phenomenon. Concrete mixing time should be consistent with the "concrete structure works and acceptance norms". Scene sent people (pilot) to meet than mixing station implementation, and supervision and inspection of raw materials, Tanladu, ban pieces sampling, calibration and inspection components weighter compatibility heat time.
5 concrete pouring
Demands the use of pumping out, the installation of pipelines to be smooth and pad ping. In concrete work, should control the spread of concrete and very dense. Zhendao shaped concrete, and concrete nature under construction at the selection of appropriate Zhendongqi and determine Zhendao time. Ages in the course of work and should have taken measures to prevent cracks. In pouring concrete, should produce hoisting, Zhang has used concrete and conformity assessment test cases.
6 concrete structures conservation
In the conservation process, should be in control of concrete floors and intensity conducive to the growth of temperature environment. Targets should be based on construction, environmental, cement varieties, and to cover concrete performance requirements of different conservation methods, large volume of concrete to concrete measurement of internal and surface temperature in the design requirements for temperature control within the scope, when no design requirements, the temperature difference is more than 20 degrees.