A single-component active synchronous mortar with controllable setting time and preparation method thereof
A setting time, single-component technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of uncontrollable, long setting time of single-component active mortar, etc., and achieve water erosion resistance enhanced effect
Active Publication Date: 2022-07-12
RAILWAY NO 10 ENG GRP CO LTD +1
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Problems solved by technology
[0003] At present, there are no relevant patents and documents mentioning an effective technical method to solve technical defects such as long and uncontrollable setting time of single-component active mortar. The present invention coordinates the use of time-sharing slow-release and quick-setting Based on the technical principles of timed release of components and early strength, a single-component active synchronous mortar with controllable setting time and its preparation method are proposed
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[0029] The present invention will be further clarified below in conjunction with the specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and not to limit the protection scope of the present invention. The various raw materials used in the following examples and comparative examples, if not otherwise specified, are commercially available products known in the art:
[0030] The single-component active synchronous mortar with controllable setting time of the present invention is made from the following raw materials in parts by weight: 15-30 parts of cement, 10-17 parts of mineral powder, 3-6 parts of bentonite, 1.5-3 parts of kaolin, 0.05-0.1 part of ethylene oxide powder, 0.05-0.2 part of vegetable rubber powder, 0.1-0.5 part of slow-release slump-preserving polycarboxylate water reducer, 0.5-1 part of starch-coated water glass particles, 0.2-0.5 part of early strength agent, 40 to 50 parts of m...
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The invention relates to a single-component active synchronous mortar with controllable setting time and a preparation method thereof. The synchronous mortar includes the following raw materials in parts by weight: 15-30 parts of cement, 10-17 parts of mineral powder, and 3-6 parts of bentonite. , 1.5-3 parts of kaolin, 0.05-0.1 part of polyethylene oxide powder, 0.05-0.2 part of vegetable rubber powder, 0.1-0.5 part of slow-release slump-preserving polycarboxylate water-reducing agent, 0.5-1 part of starch-coated water glass particles, Early strength agent 0.2-0.5 parts, medium and fine sand 40-50 parts, water 15-25 parts. The invention solves the technical problems that the single-component synchronous mortar has a long setting time and is easily eroded by groundwater, overcomes the problem of frequent pipe blockage in the construction process of the two-component synchronous mortar, and the obtained single-component synchronous mortar has a controllable setting time, Large thixotropy, excellent water erosion resistance and high strength after hardening, it can be used for one-time simultaneous grouting in shield construction of water-rich geology, which increases the compaction rate of one-time grouting and the filling rate after hardening. The mortar reaches the initial setting state in a short time.
Description
technical field [0001] The invention relates to the technical field of shield engineering materials, in particular to a single-component active synchronous mortar with controllable setting time and a preparation method thereof. Background technique [0002] In the process of shield construction, after the shield tail of the shield machine is separated from the segment, there is a gap of about 15cm between the segment and the surrounding rock surface, which can easily lead to construction phenomena such as the settlement of the upper soil mass, the settlement of structures, and the floating of the segment. For the above construction phenomena, the synchronous grouting method is often used to fill the gap in time. Common types of synchronous grouting include inert synchronous mortar, single-component reactive mortar and two-component reactive mortar. Among them, inert synchronous mortar is suitable for geology with less groundwater; single-component active mortar and two-comp...
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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B14/104C04B14/106C04B14/06C04B12/04C04B18/141C04B24/2611C04B24/38C04B2103/302C04B2103/10Y02W30/91
Inventor 白建军刘祎陈雷张转转陈兴强梁超杨基好刘顿段超李亮
Owner RAILWAY NO 10 ENG GRP CO LTD