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Reference naphthalene admixture and method for evaluating cement performance

An admixture and naphthalene-based technology, applied in flow characteristics, instruments, and analytical materials, can solve problems such as poor cement adaptability, uneven quality, and misjudgment of cement performance, so as to achieve good cement adaptability, stable quality, and high quality. The effect of water reduction rate

Inactive Publication Date: 2019-12-27
YAOBAI SPECIAL CEMENT TECH R&D CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of use, it is found that there are many types and models of admixtures on the market, and their quality is also uneven. Even the admixtures of the same brand and model produced by different manufacturers are quite different.
Due to the low water-reducing rate and unstable quality of admixtures used in some key projects and laboratories of commercial mixing stations, it leads to misjudgment of cement performance when using this admixture to test the adaptability of cement
When the composition, variety or manufacturer of admixtures used in key projects or commercial mixing stations changes, the adaptability of these admixtures to cement will also fluctuate and change, thus affecting the judgment results of cement performance
The problem of poor adaptability between admixture and cement is very common, which brings a lot of inconvenience to the lean production of cement
[0003] If there is no unified admixture product to measure and judge the adaptability of cement and admixture, it is impossible to grasp the fluctuation of cement quality in advance, and it is impossible to meet the market's growing demand for high-quality cement

Method used

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  • Reference naphthalene admixture and method for evaluating cement performance
  • Reference naphthalene admixture and method for evaluating cement performance
  • Reference naphthalene admixture and method for evaluating cement performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A benchmark naphthalene-based admixture is composed of the following components by weight percentage: naphthalene-based admixture masterbatch: 30%, retarder: 2%, air-entraining agent: 0.1%, water: 67.9%.

[0028] According to the JC / T 1083-2008 "Cement and Admixture Compatibility Test Method" in the clean slurry fluidity method (substitution method) test, different cement slurry fluidity tests were carried out. The 13 kinds of cement tested were P.042.5 cement produced by the branches (subsidiaries) of Yaobai Special Cement Group Co., Ltd., and the dosage was 2.3% (based on the weight of the cement after folding). The test results are shown in Table 2 .

[0029] Table 2 The technical indicators of the cement obtained after mixing the benchmark naphthalene-based admixture and cement in proportion

[0030]

[0031] As can be seen from the results in Table 2, the fluidity of the cement slurry of the benchmark naphthalene-based admixture of the present invention in the ...

Embodiment 2

[0033] A benchmark naphthalene-based admixture is composed of the following components by weight percentage: naphthalene-based admixture masterbatch: 30%, retarder: 2%, air-entraining agent: 0.1%, water: 67.9%.

[0034] The benchmark naphthalene-based admixture and commercial-mix admixture were used to carry out concrete tests on 8 kinds of P.042.5 commercial-mix cements of Yaobai Special Cement Group Co., Ltd. branches (subsidiaries). The reference naphthalene-based admixture was 2.3% (based on The weight of the cement after folding is the benchmark), and the results are shown in Table 3.

[0035] Table 3 Performance comparison of benchmark naphthalene-based admixtures and commercial-mix admixtures to the branch (subsidiary) company's P.042.5 commercial-mix cement

[0036]

[0037]

[0038] It can be seen from the comparison of the benchmark naphthalene-based admixture and the commercially mixed naphthalene-based admixture through the concrete slump and expansion test r...

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Abstract

The invention provides a reference naphthalene admixture and a method for evaluating cement performance. The reference naphthalene admixture is prepared from the following components in percentage byweight: 20 to 40 percent of naphthalene admixture master batch, 1 to 3 percent of retarder, 0.05 to 0.2 percent of air entraining agent and 60 to 80 percent of water. The reference naphthalene admixture provided by the invention has good adaptability to cement and stable and reliable quality, and can be used for timely and effectively evaluating the adaptability of the cement and the admixture andthe working performance of concrete.

Description

technical field [0001] The invention relates to a benchmark naphthalene-based admixture and a method for evaluating cement performance, belonging to the technical field of building materials. Background technique [0002] With the continuous development of the construction industry, the construction industry has higher and higher requirements for high retention, durability, adaptability and construction performance of cement, and higher requirements for admixtures, which are important components of concrete. For the admixture, in addition to its own good use effect (such as the water reducer itself should have the effect of increasing the strength of cement, reducing the amount of mixing water and saving the amount of cement, etc.), it also needs to have better adaptability with cement. However, in the process of use, it is found that there are many types and models of admixtures on the market, and their quality is also uneven. Even admixtures of the same brand and model pro...

Claims

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Application Information

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IPC IPC(8): C04B24/20C04B24/10G01N11/00
CPCC04B40/0039G01N11/00C04B2103/302C04B2103/22C04B2103/304
Inventor 白明科李海宏赵健
Owner YAOBAI SPECIAL CEMENT TECH R&D CO LTD