英文原文
The concretes mix thing
Concretes mix each qualitative index should according to the following stipulation examination: one, each kind of concretes mix the thing to examine its thickness; two, mix the luck admixture the concretes to mix the thing to examine its air content; three, according to need to examine the concretes mix the water ratio, the cement content and the uniformity.
(Ⅰ) Thickness ：
Concretes mix thickness should indicated suddenly by the slump or the Uygur thickness that the slump is suitable in the plasticity and the poured concrete mixes the thing, the Uygur thickness is suitable suddenly in the dry and hard concretes mixes the thing. Its examination method should "Plain concrete Mixes Performance test Method" according to the present national standards the stipulation carry on.
Concretes mix the basis its slump size, may divide into 4 levels, and should conform to the Table 2.1.3 stipulations.
Concretes mix the basis its Uygur suddenly thickness size, may divide into 4 levels, and should conform to the Table 2.1.4 stipulations.
Slump or the Uygur thickness's allowable deviation should conform stipulations separately suddenly.
(Ⅱ) Air content ：
Mixes the luck admixture concretes the air content to satisfy the design and the construction craft request. Uses the thick aggregate according to the concretes the maximum particle size, its air content's limiting value is not suitable surpasses the stipulations.
Concretes mix the air content examination method should "Plain concrete Mixes Performance test Method" according to the present national standards the stipulation to carry on. The test result with wants the evaluation the allowable deviation scope to be ±1.5%.
(Ⅲ) The water ratio and cement content：
Concretes' biggest water ratio and the minimum cement content should conform to the present national standards "Concrete structure Project Construction And Approval Standard" stipulation.
Concretes mix the water ratio and cement content's examination method should "Plain concrete Mixes Performance test Method" according to the present national standards the stipulation carry on. The actual water ratio and the cement content, should meet the design requirements.
(Ⅳ) Uniform：
Concretes mix the thing to mix evenly, the color is consistent, do not have the segregation and the weeping phenomenon.
Concretes mix the uniform examination method should according to the present national standards "Concrete mixer Performance test Method" the stipulation carries on. when the 2.1.12th inspection concretes mix the uniformity, should in the mixer ex-denning process, from the ex-denning class 1 cook 4 to 3/4 between the spot adopts the test specimen, carries on the experiment, its test result should tally following stipulated: in one, concretes the mortar density two times measured that the value the relative error should not be bigger than 0.8%; in the two, unit volume concretes the thick aggregate content two times measured that the value the relative error should not be bigger than 5%.
Proportioning of concrete's determination and controls
Proportioning of concrete should according to the national present standard "Plain concrete Mixture ratio Design technique Stipulation" and "Concretes Strength test Evaluation Standard" the stipulation, and tries through the design calculation to match the determination. When the mixture ratio determination uses the early estimation concretes intensity, its testing method should stipulate according to the national present standard carries on. in the construction process, do not change the mixture ratio at will.
Pump concrete mixture ratio should consider that pump over vertical and contour interval, bend establishment, pump over equipment's factors and so on engineering factor, carries on the design according to the concerned requirements, and should conform to the present national standards "Concrete structure Project Construction And Approval Standard" stipulation.
Proportioning of concrete use process, should act according to the concretes quality the dynamic information, makes the adjustment promptly. The fourth chapter concretes quality's production control
Concretes quality's production control should include the coagulation soil constitution material the measurement, the concretes mix working procedure and so on agitation, transportation, construction and maintenance controls.
Construction (production) the unit should act according to the design requirements, proposed that the concretes quality control goal, establishes the concretes quality assurance system, draws up the essential concretes production quality control system.
Deals with the qualitative data which in the production process obtains in various working procedures, regular (each month, season, year) carry on the statistical analysis, and should use various idioplasms quantity statistics control chart, according to production process's quality tendency, take the measure and the countermeasure promptly.
Construction (production) the unit must accumulate the complete concretes to produce the entire process the technical data and the quality detection material, and should classify the reorganization archive.
Measures
In the measurement working procedure, the entire production period each concretes each composition material measurement result's deviation should conform to the stipulations. note: The concretes each composition material's measurement should according to the weightometer, the water and the liquid admixture may according to the volumenometer.
Each operating shift official weighing, deals with the rationing equipment to carry on a zero examination.
Production process should determine the aggregate the moisture content, each operating shift should not be short in one tim
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