High belite sulphoaluminate cement based disturbance-resistance concrete for rush repair and preparation method of high belite sulphoaluminate cement based disturbance-resistance concrete

Abstract

The invention discloses high belite sulphoaluminate cement based disturbance-resistance concrete for rush repair and a preparation method of the high belite sulphoaluminate cement based disturbance-resistance concrete and belongs to the field of building materials. The high belite sulphoaluminate cement based disturbance-resistance concrete for rush repair is prepared from the following raw materials in parts by weight: 100 parts of high belite sulphoaluminate cement, 1-100 parts of mineral admixture, 120-200 parts of fine aggregate, 200-300 parts of coarse aggregate, 0.1-1.0 part of polymer,1.0-2.0 parts of fiber. The water cement ratio is 0.28 to0.45. The polymer is a water reducer and a thickener; and the fibers are PP, PVA or steel fibers. For the high belite sulphoaluminate cement based disturbance-resistance concrete for rush repair, by adopting the high belite sulphoaluminate cement as a main cementitious material of disturbance-resistance concrete, the characteristics of quicksetting, early strength and high later strength of the high belite sulphoaluminate cement are exerted; and by optimizing a proportion of the water reducer and crack-resistance fibers, the disadvantages of low early strength, long disturbed period, easiness in cracking under disturbance and the like of ordinary concrete are solved, the disturbance resistance performance and the crack resistance performance of the concrete are improved, the influence of vehicle disturbance on the performance of the concrete is remarkably reduced, the requirement for demi traffic and demi closing of engineeringnowadays is met, the construction efficiency is improved, and the quality of the engineering is ensured.

Description

technical field [0001] The invention relates to a high-belite sulfoaluminate cement-based anti-disturbance concrete for emergency repair, which belongs to the technical field of various engineering technologies, such as traffic, roads and bridges, which are easily disturbed and require emergency repair. Background technique [0002] With the development of my country's economy, my country's infrastructure has achieved world-renowned achievements, and the highway and bridge industry is also developing rapidly. However, the mileage of highways in my country is increasing year by year, and the roads and bridges built in the early stage have begun to appear partial cracking and peeling under factors such as traffic load and environmental erosion, resulting in decline in performance, reduced safety and durability, and cannot meet the modern requirements. Traffic demands urgently require repair and reinforcement. However, if the traffic is open during the construction process, the...

AI Technical Summary

Problems solved by technology

However, the mileage of highways in my country is increasing year by year, and the roads and bridges built in the early stage have begun to appear partial cracking and peeling under factors such as traffic load and environmental erosion, resulting in decline in performance, reduced safety and durability, and cannot meet the modern requirements. Traffic demands urgent need for restoration and reinforcement

However, if the traffic is opened during the construction process, the disturbance of the highway bridge caused by the vehicle load will cause micro-cracks and loss of early bond force in the newly poured concrete, causing damage to its mechanical properties and durability

[0003] At present, the existing anti-disturbance concrete mainly uses ordinary Portland cement as the cementitious material, and a large amount of anti-disturbance admixtures are added to achieve the purpose of resisting traffic disturbance. The hardening speed of the material is slow, and the early strength is not high. The coagulation time is often more than 5 hours, which will inevitably increase the probability of being disturbed and damaged

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