Compound solidifier for mucky soil and application thereof
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A composite curing agent, silty soil technology, applied in application, soil protection, fertilizer mixture, etc., can solve the problems of strength attenuation, limited excitation effect of mineral powder-solidified soil, etc.
Inactive Publication Date: 2017-07-04
ZHEJIANG PROVINCIAL INST OF COMM PLANNING DESIGN & RES CO LTD
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The test results showed that Na 2 CO 3 The excitation effect on mineral powder-solidified soil is very limited, and the effect of NaOH on stimulating mineral powder is relatively best, but the strength of the solidified soil will decline after 90 days
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Embodiment 1
[0032] It is 6.8% to get organic matter content, and water content is the silty soil sample 1 of 87.1%, before test, remove soil sample impurity, take by weighing 600g soil sample, add different amount of silty soil composite curing agent (each component The weight percentages are: cement 46%, slag 34%, fly ash 15%, triethanolamine 5%), the mixture is stirred evenly to make 3 parallel cylinder samples of φ39.1×80mm, standard maintenance. The 14-day and 28-day unconfined compressive strengths are obtained as shown in Table 2:
[0033]Table 2 Soil sample 1 curing strength table
[0034]
Embodiment 2
[0036] Getting organic matter content is 7.1%, and water content is the muddy soil sample 2 of 89.5%, before test, remove soil sample impurity, take by weighing 600g soil sample, add different amount of muddy soil composite curing agent (each component The weight percentages are: cement 46%, slag 34%, fly ash 15%, triethanolamine 5%), the mixture is stirred evenly to make three φ39.1×80mm cylindrical parallel samples, standard curing. The 14-day and 28-day unconfined compressive strengths are obtained as shown in Table 3:
[0040] It is 7.1% to get organic matter content, and water content is the muddy soil sample 3 of 91.1%, before test, remove soil sample impurity, take by weighing 600g soil sample, add different amount of muddy soil composite curing agent (each component The weight percentages are: cement 46%, slag 34%, fly ash 15%, triethanolamine 5%), the mixture is stirred evenly to make three φ39.1×80mm cylindrical parallel samples, standard curing. The 14-day and 28-day unconfined compressive strengths are obtained as shown in Table 4:
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Abstract
The invention discloses a compound solidifier for mucky soil, which includes, by weight, 46% of cement, 34% of slag, 15% of fly ash, and 5% of triethanolamine. In the invention, cement is used as a main solidifying material, the fly ash and the slag are used as alkaline activators, and the triethanolamine is used as a surfactant. The compound solidifier, on the basis of solidification mechanism, aims to increase pH value of soil body, promote procedure of hydration reaction of cement and setting and hardening of a hydrate, and enhance activity of ions participating in the reaction; by selecting the solidifying material and other components, the optimal solidification effect is achieved through a series of reactions. The invention also provides applications of the compound solidifier for mucky soil in solidification treatment of soft soil foundation. In practical engineering, addition amount of the compound solidifier is regulated so as to fit and solidify soft soil in different organic matter content and water content, thereby achieving best solidification and economic effect.
Description
technical field [0001] The invention belongs to the technical field of civil construction engineering, and in particular relates to a muddy soil composite curing agent and its application. Background technique [0002] Based on engineering needs, many scholars have devoted themselves to the research of curing agents. At present, there are at least hundreds of curing agents on the market. The organic matter content and water content of the soil have an important influence on the effect of the curing agent. Most scholars have done a lot of research work on the curing agent formulation for the change of the organic matter content or water content, but there is no one that considers the water content and organic matter content at the same time. Curing agent developed for the role. [0003] The influence of soil moisture content on the curing effect is multifaceted. First of all, the chemical reaction of inorganic curing agents is particularly dependent on the water environment...
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