A kind of cement-based engineering material with early strength, low shrinkage and high toughness and preparation method thereof

An engineering material, low-shrinkage technology, applied in climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of debonding between repair layer and base layer, high content of PVA fiber, limiting large-scale application, etc. Achieve the effect of improving debonding and cracking, good working performance and excellent volume stability.
CN105948665BActive Publication Date: 2018-10-09WUHAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WUHAN UNIV OF TECH
Publication Date
2018-10-09

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Abstract

The invention belongs to the field of building materials, and discloses an early-strength, low-shrinkage and high-toughness cement-based engineering material. The cement-based engineering material is prepared from 460-500kg / m<3> of sulphoaluminate cement, 50-70kg / m<3> of ordinary portland cement, 50-70kg / m<3> of silica fume, 40-60kg / m<3> of steel fibers, 8-10kg / m<3> of polyvinyl alcohol fibers, 200-220kg / m<3> of water, 7.0-7.4kg / m<3> of a water reducer, 0.2-0.22kg / m<3> of an early strength agent, 1.7-1.9kg / m<3> of a set retarder and 1180-1220kg / m<3> of river sands. The cement-based engineering material prepared in the invention has the advantages of good working performance, high early strength, greatly increased late strength, excellent mechanical performances and volume stability, high toughness, good mechanical performances and durability, and large practical application values.
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Description

technical field

[0001] The invention belongs to the field of building materials, and in particular relates to an early-strength, low-shrinkage, high-toughness cement-based engineering material and a preparation method thereof. Background technique

[0002] Cement-based engineering material (engineered cementitious composite, ECC) is a new type of cement-based composite material for engineering based on the optimal design of microscopic physical and mechanical principles. Its design concept was first proposed by Li Victor C of the University of Michigan in the 1990s. It is made of special organic synthetic fiber as one of the main materials, plus a special blending process, which has better tensile, wear-resistant, toughness, acid and alkali resistance, compactness, impact resistance, etc. than traditional cement-based materials. A series of high-quality features have been widely used in projects such as concrete structure protection, bridge deck repair, and non-expandable br...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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