Barium-containing sulphoaluminate soft soil curing agent and preparation method thereof

A technology of barium sulfoaluminate and curing agent, applied in chemical instruments and methods, soil conditioning materials, organic fertilizers, etc., can solve undiscovered problems and achieve fast curing speed and high strength of solidified soil

Inactive Publication Date: 2013-09-04
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Abstract
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  • Application Information

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Problems solved by technology

After searching, no patent application or literature report about making barium-containing sulfoaluminate into soft soil curing agent was found

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 7~9 and comparative example 3

[0041] 54.6wt% barium-containing sulfoaluminate clinker was ground together with 34.4wt% calcined gypsum, 10% lime, 0.5wt% polyacrylamide water retaining agent, and 0.5wt% sodium citrate retarder to make a curing agent. The soft soil to be reinforced is taken from the fine-grained saturated organic soil in Chengdu. The soil was dried at 110°C for 24 hours and crushed with a rubber hammer until all of it passed through a 3mm round hole sieve. Add 18.18wt%, 22.22wt%, 28.57wt% curing agent and 28.57wt% P.C32.5 ordinary Portland cement to the dried soil respectively, stir evenly, add distilled water according to the moisture content of 60%, and stir for 2 minutes Finally, pour the slurry into a 40×40×160mm cement mortar trial mold and vibrate to form it. The solidified soil was sealed together with the mold, and cured at 20°C for 1 day and 3 days, and the unconfined compressive strength of the solidified soil was measured after demoulding. The materials and strengths of this embo...

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Abstract

The invention relates to the field of a soft soil curing agent, and particularly provides a barium-containing sulphoaluminate soft soil curing agent and a preparation method thereof. The sulphoaluminate soft soil curing agent comprises components in percentage by weight as follows: (1), 50%-80% of sulfoaluminateclinker containing barium; (2), 25%-40% of calcined gypsum; (3), 10%-12% of lime; (4), 0.5%-2% of a water-retaining agent; and (5), 0.5%-5% of a retarder. The preparation technique process comprises the steps of calcinating natural gypsum, preparing ingredients, mixing and grinding. The soft soil curing agent has the characteristics of quick condensation, high strength and no shrinkage of curing soil volume, total strength can be formed after the curing for 1-3 days, and the soft soil curing agent is particularly suitable for quick maintenance and reinforcement of road foundations; and besides, under the same additive amount, the unconfined compressive strength of compacted soil adopting the soft soil curing agent is apparently higher than that of compacted soil adopting P.C 32.5 ordinary Portland cement, and the reinforcement effect is remarkable.

Description

technical field [0001] The invention relates to the field of soft soil curing agents, in particular to a barium-containing sulfoaluminate soft soil curing agent and a preparation method thereof. Background technique [0002] Soft soil refers to a type of soil with low bearing capacity, large void ratio, high water content and high compressibility. Reinforcement of soft soil foundation has become one of the hot topics in engineering construction and maintenance. There are many methods of soft soil reinforcement, such as compaction reinforcement, heat treatment reinforcement, and chemical reinforcement. Among them, curing agent reinforcement of soft soil has become the most widely used method of soft soil reinforcement because of its low cost and relatively simple construction. . [0003] Soft soil curing agent refers to materials that can directly cement soil particles at room temperature, or can react with clay minerals to form cementitious substances, thereby improving th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40C09K103/00
Inventor 徐冠立孙传敏孙遥管登高何政伟
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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