Determination method of cement concrete mixture water-cement ratio

A technology of cement concrete and measurement method, applied in the direction of material inspection products, etc., can solve the problems of high price of testing equipment, unfavorable promotion and use, etc., and achieve the effects of shortening drying time, increasing contact area, and reducing measurement error.

Active Publication Date: 2015-04-15
马润辰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Other methods for determining the water-to-binder ratio of cement concrete mixtures, such as "air flow meter method", "unit weighing method", "reagent concentration method", "neutron method", and "capacitance method", the related testing equipment is expensive , is not conducive to the promotion of the use of

Method used

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  • Determination method of cement concrete mixture water-cement ratio
  • Determination method of cement concrete mixture water-cement ratio
  • Determination method of cement concrete mixture water-cement ratio

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The concrete mix ratio is shown in Table 1.

[0040] Table 1 Concrete mix ratio

[0041]

[0042] A kind of assay method of water-binder ratio of cement concrete mixture, concrete steps are as follows:

[0043] 1) Sampling the concrete mixture within the detection time limit, the specific steps are as follows: within the detection time limit, shovel two concrete mixture samples of the same quality from different diagonal directions of the concrete mixture, and the concrete mixing The mass of the material sample m 0 It is 400~500g, and the water-binder ratio is determined by taking the average value of the test results of two samples as the measured value. When the difference between the test results of the two samples is greater than 0.015, the sample should be re-sampled for testing.

[0044] The detection time limit refers to the period from the initial stage of cement hydration reaction to the rest period of hydration, which is within 1 hour after adding water t...

Embodiment 2

[0073] The test procedure is the same as in Example 1.

[0074] 1. Concrete mix ratio, see Table 5.

[0075] Table 5 Concrete mix ratio

[0076]

[0077] 2. See Table 6 for the formulation and dosage of leveling agent.

[0078] Table 6 Formula and dosage of leveling agent

[0079]

[0080]

[0081] 3. See Table 7 for the inhibitor formula and dosage.

[0082] Table 7 Repressor formula and dosage

[0083]

[0084] 4. The test results are as follows, see Table 8.

[0085] Table 8 Test results of water-binder ratio

[0086]

[0087] 5. Detection error value=0.370-0.372=-0.002<±0.015.

Embodiment 3

[0089] The test procedure is the same as in Example 1.

[0090] 1. Concrete mix ratio, see Table 9.

[0091] Table 9 Concrete mix ratio

[0092]

[0093] 2. See Table 10 for the formulation and dosage of leveling agent.

[0094] Table 10 Formula and dosage of leveling agent

[0095]

[0096] 3. See Table 11 for the inhibitor formula and dosage.

[0097] Table 11 Repressor formula and dosage

[0098]

[0099] 4. The test results are as follows, see Table 12.

[0100] Table 12 Test results of water-binder ratio

[0101]

[0102] 5. Detection error value=0.344-0.337=0.007<±0.015.

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Abstract

The invention discloses a determination method of a cement concrete mixture water-cement ratio. The method comprises the specific steps that: (1) the concrete mixture is sampled within a detection time limit; (2) after sampling, the concrete mixture sample is subjected to an inhibitory treatment, a sand mixing treatment, and a blast drying treatment; and water content Wc of the concrete mixture sample is calculated; (3) with a lowest water-cement ratio beta of a hydration reaction during the drying process, the concrete mixture sample water content Wc is corrected; concrete mixture sample unilateral water content mw is calculated; and with a concrete mixture sample cementing material total amount mb, the concrete mixture sample water-cement ratio is calculated with a formula that W / B=mw / mb.

Description

technical field [0001] The invention relates to a method for measuring the water-binder ratio of a cement concrete mixture, in particular to a method for measuring the water-binder ratio of a cement concrete mixture based on a homogenization suppression sand mixing drying method. Background technique [0002] The common drying method to measure the water-binder ratio of the cement concrete mixture does not consider the problem of hydration reaction consumption of a certain amount of water during the drying process, and does not deal with the hydration reaction, and the concrete solidifies into a whole ball and locks the water The parts cannot be lost well, and the common drying measurement method is to measure the weight difference before and after drying to calculate the moisture content and water-binder ratio of the concrete mixture through simple drying, so there is a big problem of measurement error. [0003] Other methods for determining the water-binder ratio of cement...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/38
Inventor 马润辰李海波刘征涯吕良
Owner 马润辰
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