High-ductility cement-based composite material with fine stone aggregate

Abstract

The invention relates to a high-ductility cement-based composite material with fine stone aggregate. The high-ductility cement-based composite material is characterized in that the mixing amount of fibers among raw materials is not higher than 3% of the total volume of the composite material; the other materials, except for the fibers, include, by weight, 30-40 parts of water, 30-40 parts of cement, 35-65 parts of active mineral admixtures, 5-13 parts of admixtures and 40-50 parts of fine stone aggregate. The raw materials for the high-ductility cement-based composite material with the fine stone aggregate can be weighed according to proportions and then can be mixed and stirred in fields, or dry mixtures can be preliminarily prepared from the raw materials. The high-ductility cement-based composite material with the fine stone aggregate has the advantages that the high-ductility cement-based composite material is high in strength, impact resistance and abrasion resistance, stable in performance, low in dry shrinkage and obvious in ductile failure capacity and can be widely popularized in the field of civil and traffic engineering.

Description

technical field [0001] The invention relates to a new functional material in the field of civil engineering and traffic engineering materials, in particular to a high ductility fine stone aggregate cement-based composite material. [0002] technical background [0003] Structures and components using concrete as raw materials are widely used in the fields of civil engineering and transportation. However, due to the high brittleness of concrete materials, their damage during use is often sudden, and the safety factor is low. With the continuous development of concrete material technology, various metal fibers, inorganic fibers and organic fibers have been widely used in concrete materials, which have certain effects on the toughening and crack resistance of materials. However, due to the limitation of material ratio and construction technology, the amount of fiber in traditional concrete materials is very limited, which makes the material lose its bearing capacity instantly af...

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Problems solved by technology

[0005] However, at present, due to the high production cost of ECC materials, and because they do not use coarse aggregate in the material composition, the strength improvement formed under normal curing conditions is limited, and the drying shrinkage during the matrix hydration process is large, and the material The elastic modulus after hardening is low, and the synergistic force effect with the existing structure is also poor, which hinders its wide application in engineering applications

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