Measurement method of plastic tensile strength of cement-base material

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...

AI Technical Summary

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 tensile stress of plastic capillary loss of water shrinkage of cement-based materials, it is difficult to establish, Although the research in this field is considered important, it is difficult to get started, so we have to "cut around" or "stay away"

Images