Normal-temperature weak-alkali geopolymer excited cement soil and preparation process thereof

Abstract

The invention discloses normal-temperature weak-alkali geopolymer excited cement soil and a preparation method thereof. The cement soil is prepared from an alkali-excited gelling material and clay; wherein the alkali-excited gelling material comprises an active agent and an exciting agent; and taking the clay as reference, the mixing amount of the active agent is 6 to 12 percent and the mixing amount of the exciting agent is 3 to 11 percent. The normal-temperature weak-alkali geopolymer excited cement soil is formed by taking clay as the main raw material, mixing with the active agent and theexciting agent in a dry mixing way and adding water to completely mix, wherein the strength of the mixing initial period is low and the setting time is moderate. The uniaxial compressive strength of the cement soil is measured through an unconfined compression test; and the test indicates that when the mixing amount ratio of the alkali-excited gelling material to the clay is approximately 1:5 andthe mixing amount ratio of the active agent to the exciting agent is 2:1, the mass ratio of components in the exciting agent is 1:1 and the compressive strength of the cement soil is optimal. Throughcomparison, it is found that the uniaxial compressive strength of the mixed material is 2 times that of a pure clay test sample and is 1.5 times that of a limestone soil test sample, and good application prospect in roadbed construction is achieved.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a normal-temperature weak alkali geopolymer activated cement soil and a preparation process thereof. Background technique [0002] With the rapid development of the economy and the rapid development of science and technology, mineral resources and energy materials are increasingly depleted, and energy conservation, emission reduction and green environmental protection have attracted much attention. The preparation of traditional inorganic non-metallic materials requires high-temperature sintering above 1000°C, which consumes energy and produces a large amount of greenhouse gases and toxic gases. Compared with traditional Portland cement, geopolymers do not require high-temperature calcination during the preparation process, and carbon dioxide The emission is also 70%-80% lower than that of Portland cement production, and the raw materials are mostly industrial by-pro...

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Problems solved by technology

However, the limitation of this patent is that it only studies the influence of the activator ratio on the performance of cement soil, and the performance of the obtained cement soil needs to be further improved.

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