Method for measuring strength of cementing materials

A technology of cementitious materials and measurement methods, which is applied in the direction of material inspection products, etc., can solve the problems such as the inability to obtain the analytical expressions of strength and influencing factors, and the inability to obtain the magnitude of the strength correlation.

CN103472213BActive Publication Date: 2015-03-18SOUTHEAST UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2015-03-18

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Abstract

The invention discloses a method for measuring the strength of cementing materials. The method includes the following steps: step1, testing the apparent density of cement and the apparent density of a mineral admixture, step2, obtaining the reaction degree of the mineral admixture in slurry of the cementing materials, step3, obtaining the hydration degree of the cement in the slurry of the cementing materials, step4, obtaining three main influence factors influencing the strength of the cementing materials, step5, establishing a cementing material strength GM (1,4) model, and step6, substituting the three main influence factors of the cementing materials to be measured to the cementing material strength GM (1,4) model to obtain the strength of the cementing materials. According to the method, the strength of different cementing material combinations can be obtained by calculation through simple tests, and the method is high in accuracy, good in reliability and capable of solving the problem that only through strength tests can the strengths of all the different cementing material combinations be obtained.
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Description

technical field

[0001] The invention relates to a measuring method, in particular to a measuring method for the strength of a gelled material. Background technique

[0002] The strength of cement is tested according to the "Cement Mortar Strength Test Method (ISO Method)" (GB / T17671-1999). However, the preparation of high-performance concrete generally requires the addition of mineral admixtures, so that the composition of the cementitious material changes. However, the strength of different combinations of cementitious materials can only be obtained through strength tests, which not only requires the formation of a large number of mortar specimens, but also waits until the curing age of the mortar specimens is 28 days, which is cumbersome. It is time-consuming and consumes a lot of manpower and material resources.

[0003] So far, there have been many studies and applications on the strength of cementitious materials, and the methods with wide application and high design a...

Examples

Embodiment Construction

[0039] The symbols of cementitious materials are: CI is P·I52.5 grade cement produced by Jiangnan Onoda Cement Plant; CII is P·II42.5 grade cement produced by Huaxin Cement Co., Ltd.; FAI-1, FAI-2 and FAI -3 are grade I fly ash from different origins; FAII-1 and FAII-2 are grade II fly ash from different origins; BFS95-1 and BFS95-2 are S95 grade slag from different origins; S75 and S105 is S75 and S105 grade mineral powder; MK-1 and MK-2 are respectively the specific surface area of ​​550m 2 / kg and 1200m 2 / kg of metakaolin; LP, QP and EP are limestone powder, quartz sand powder and corundum powder with a purity greater than 90%, respectively.

[0040] 1) The apparent density of the cement and the apparent density of the mineral admixture obtained from the test are shown in Table 1.

[0041] Table 1 Cement and mineral admixture apparent density / g / cm 3

[0042]

[0043] 1) The degree of reaction of the mineral admixture in NaOH-containing saturated lime water was obtai...