Cement grouting material

Abstract

The invention provides a cement grouting material with self-compaction and high fluidity. The cement grouting material comprises anti-cracking mortar, flow promoting components, a plasticizer, coagulation delaying components and a coagulation accelerating component. The anti-cracking mortar comprises, by mass, 4-8% of Portland cement, 38-47% of sulfate aluminum cement, 42-52% of quartz sand, 4.6-4.9% of swelling agents and 0.1-0.4% of polypropylene fibers. The flow promoting components include water reducing agents and defoaming agents. The plasticizer is cellulose ether. The coagulation delaying components include one or more of tartaric acid, sodium gluconate and citric acid. The coagulation accelerating component contains calcium hydroxide. The cement grouting material can complete grouting on the condition of self-gravity and can be grouted successfully one time during high-altitude operation of a support and an inhaul cable pipeline of a bridge with no need for vibrating or secondary grouting; construction of the material is simple since it is only required to add water; the grouting material can be used in construction at a low temperature.

Description

technical field [0001] The invention provides a cement grouting material, in particular a grouting material for bridge supports and cable grouting. Background technique [0002] In the construction of bridge support grouting, the traditional grouting material used is generally pure cement mortar. During construction, the mixed slurry of cement, water, water reducer and river sand is used for grouting. However, no matter the bearing grouting of the bridge or the cable grouting belongs to high-altitude operations, the construction is difficult, and the vibration is inconvenient, and some even cannot be vibrated. The performance of traditional grouting materials is poor, and there are usually phenomena such as poor adaptability between cement slurry, sand and water reducer, resulting in the following serious problems in the grouting of bearings and cables: [0003] 1) The quality stability and fluidity of the slurry are poor, the cable pipeline is not dense, it is difficult t...

AI Technical Summary

Problems solved by technology

However, whether it is bridge support grouting or cable grouting, it is a high-altitude operation, which is difficult to construct and inconvenient to vibrate, and some even cannot vibrate

The performance of traditional grouting materials is poor, and there are usually phenomena such as poor adaptability between cement slurry, sand and water reducer, resulting in the following serious problems in the grouting of bearings and cables:

[0003] 1) The quality stability and fluidity of the slurry are poor, the cable pipeline is not dense, it is difficult to form a full state, and secondary pressure is often required;

[0004] 2) The mixed slurry has a high bleeding rate, is easy to segregate and stratify, and has low strength after coagulation;

[0005] 3) After hardening, the slurry is not dense, the surface of the support is uneven, there are many gaps, and it is easy to be empty, so that the force on the support is uneven, which seriously affects the service life of the bridge

[0008] The grouting material provided in the above-mentioned patents more or less solves some of the above-mentioned problems, but when it is used for grouting the bearings and cables of bridges, the grouting effect is still not ideal, and the above-mentioned problems cannot be fully resolved more or less. to solve

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