Measurement method of plastic tensile strength of cement-base material

A cement-based material, tensile strength technology, applied in the field of material science and engineering, can solve the problem of difficulty in establishing test methods

Inactive Publication Date: 2004-09-08
TONGJI UNIV
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  • Summary
  • Abstract
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Problems solved by technology

In view of the fact that there is currently no test method for the plastic properties of cement-based materials, such as the plastic tensile strength of cement-based materials, the plastic loss of water shrinkage of cement-based materials, and the...

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  • Measurement method of plastic tensile strength of cement-base material
  • Measurement method of plastic tensile strength of cement-base material

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Experimental program
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Embodiment Construction

[0027] Take the 8-shaped mold as an example below to further elaborate the present invention.

[0028] 1. Make plastic tensile strength test mold

[0029] The mold consists of two symmetrical 8-shaped mold halves, such as figure 1 shown. Each half-mold base plate is flush with the 8-shaped half-mold opening, and two 8-shaped half-molds connected with the base plate 2 can just be combined into a complete 8-shaped mold 1. A perforation is respectively opened at the two ends centers of the two 8-shaped half-moulds, and the cords are inserted and fixed in the half-moulds; The 8-shaped mold formed by pairing two 8-shaped half-molds is placed on a whole flat supporting plate 3. The upper surface of the pallet and the lower surface of the bottom plate should be flat and smooth, or rollers should be installed between them to reduce the friction during relative movement. When testing cement paste and mortar, a small-sized 8-shaped mold is used, and when testing concrete, a larger-s...

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Abstract

The present invention is measurement method of plastic tensile strength of cement-base material. Two figure-8 shaped semi-molds halved along neck cross section, bottom plate, support plate, etc. are adopted, so that horizontally set plastic material in gravitational field may be supported and measured via applying horizontal stress for measuring plastic tensile strength. The method may be used in measuring the plastic tensile strength of cement-base material, such as slurry, mortar, concrete and their composite material, in any time from formation to final solidification. The present invention may be used in the research, development, production, application and management of cement-base material for evaluating cracking performance, etc.

Description

technical field [0001] The invention belongs to the field of material science and engineering technology, and in particular relates to a method for testing the tensile strength of cement-based materials and similar materials in a plastic state. technical background [0002] Cement concrete is widely used in construction projects due to its wide source of raw materials, low price, easy shaping, and excellent mechanical properties. It is currently the largest man-made building material and will be an irreplaceable main building material in the 21st century. However, cement concrete has some defects, such as heavy weight, low tensile strength, and easy plastic shrinkage cracking, etc., which limit its wider use in structural engineering. Among them, the defect that cement concrete is prone to plastic shrinkage and cracking has a great impact on the quality of concrete engineering. Especially for high-strength concrete, at least it will cause rework during the project construct...

Claims

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Application Information

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IPC IPC(8): G01N3/00G01N3/08
Inventor 马一平
Owner TONGJI UNIV
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