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Calcareous sand cementationsample preparation and inspection method thereof

An inspection method, calcareous technology, which is applied in basic structure engineering, preparation of test samples, on-site foundation soil survey, etc., can solve problems such as low strength, rough calcareous sand particles, and many edges and corners, and achieve reliable data base effect

Inactive Publication Date: 2009-03-25
INST OF MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0002] The cementitiousness of calcareous sand makes it special from ordinary sand, which also causes many problems in engineering. Pile foundations are often used in calcareous sand foundations. Calcareous sand has rough particles, many edges and corners, and large internal friction angles. However, The friction test of the steel-soil contact surface shows that the external friction angle δ basically does not change with the increase of the normal pressure, that is, the friction force does not change along the depth in the soil layer, so its total strength is not high

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  • Calcareous sand cementationsample preparation and inspection method thereof

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Embodiment Construction

[0016] Calcareous sand cemented sample preparation and its inspection method of the present invention, specifically: according to the sand quality and the actual strength required by the project, the cement material and calcareous sand are mixed in the range of 5% to 20% by weight, and added Mix the mixture evenly with water and tamp it in the mold to obtain the sample; let the sample stand for 3 days to make it harden; take out the sample, put two layers of rubber film on it, put the sample in three The test is carried out in the shaft testing machine; the unconfined compressive strength test data and data curve are obtained.

[0017] The present invention has made different calcareous sand samples with three kinds of cementing materials in implementation process, and has carried out unconfined compressive strength test to these samples, obtains unconfined compressive strength test as shown in the accompanying drawing curve. It can be seen from the attached figure that the u...

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Abstract

The invention discloses a method for preparing and detecting a cementation sample of calcareous sand. The method specifically comprises the following steps: mixing cementing materials with the calcareous sand by weight ratio according to the sand quality condition, adding water to the mixture to mix the mixture evenly, and tamping the mixture in a mould to obtain a sample; keeping stand the sample for three days to harden the sample; and taking out the sample, sleeving a rubber membrane on the sample, and putting the sample into a triaxial test machine to perform experiment and obtain the experimental data of unconfined compression strength and the data curve. The method can obtain the influence on the strength of the calcareous sand caused by different cementations through testing the cementation sample of the calcareous sand with various weight ratios and analyzing experimental data, thereby providing a safe and reliable data base for the application of the calcareous sands to engineering.

Description

technical field [0001] The invention relates to a calcareous sand cement sample preparation and a testing method thereof. Background technique [0002] The cementitiousness of calcareous sand makes it special from ordinary sand, which also causes many problems in engineering. Pile foundations are often used in calcareous sand foundations. Calcareous sand has rough particles, many edges and corners, and large internal friction angles. However, The friction test on the steel-soil contact surface shows that the external friction angle δ basically does not change with the increase of the normal pressure, that is, the friction force does not change along the depth in the soil layer, so its total strength is not high. Contents of the invention [0003] In view of the problems existing in the existing situation, the purpose of the present invention is to provide a high-strength calcareous sand cemented sample preparation, and a further purpose of the present invention is to provi...

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Application Information

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IPC IPC(8): G01N1/28E02D1/00
Inventor 赵京鲁晓兵王丽王爱兰王淑云
Owner INST OF MECHANICS - CHINESE ACAD OF SCI
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