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

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

Inactive Publication Date: 2017-05-10
CHENGDU UNIVERSITY OF TECHNOLOGY
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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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  • Barium-containing sulfoaluminate soft soil curing agent and preparation method thereof

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Effect test

Embodiment 7~9 and comparative example 3

[0042] 54.6wt% of barium-containing sulfoaluminate clinker, 34.4wt% of calcined gypsum, 10% lime, 0.5wt% of polyacrylamide water retention agent, and 0.5wt% of sodium citrate retarder are ground together to form a curing agent. The soft soil to be reinforced was taken from fine-grain saturated organic soil in Chengdu. The soil was dried at 110°C for 24 hours and crushed with a rubber hammer until it passed through a 3mm round screen. Add 18.18wt%, 22.22wt%, 28.57wt% curing agent and 28.57wt% P.C32.5 ordinary Portland cement to the dried soil, mix well and add distilled water at a moisture content of 60%, and stir for 2 minutes Afterwards, the slurry was poured into a 40×40×160mm cement mortar test mold and vibrated to form. The cured soil was sealed with the mold and cured at 20°C for 1 day and 3 days. After demolding, the unconfined compressive strength of the cured soil was measured. The materials and strengths of this example and the comparative example are shown in Table 3...

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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 compression. Reinforcing soft soil foundation has become one of the hot topics in engineering construction and maintenance. There are many methods for soft soil reinforcement, such as compaction reinforcement, heat treatment reinforcement and chemical reinforcement. Among them, curing agent-reinforced 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 a material that can directly cement soil particles at room temperature, or can react with clay minerals to form a gelling substance, thereby improving the physical properties of ...

Claims

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Application Information

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Patent Type & Authority Patents(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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