Rubber modified solidified soil, and preparing and construction method

Abstract

A rubber modified solidifying soil comprises the following components by weight percentage: 1 to 20 percent of rubber material, 3 to 35 percent of gelled material, 40 to 95 percent of soil and 0 to 5 percent of water. The rubber modified solidifying soil is formed by mixing soil, gelled material and rubber material with water and stirring and solidifying the mixture. The preparation and construction method comprises the steps as follows: (1) the water content of the engineering soil is measured; (2) the optimal water content of soil is defined; (3) the water content is adjusted; (4) the adopted gelled material is mixed evenly; (5) the soil with the adjusted water content by the step (3) which reaches the optimal or approaches the optimal is mixed with the gelled material and rubber material according to the designed weight percentage of the components, and then water is added into the mixture and then the obtained mixture is stirred evenly, and then the mixture is paved and rolled for shaping; after shaped, water is scattered on the obtained soil for maintaining. The solidifying soil of the invention has higher toughness, anti-shrinking and anti-crack capability and fatigue resistant capability, the apparent density is reduced and simultaneously, the waste rubber is utilized again; the economic and environmental benefits are better and the application field is wide.

Description

(1) Technical field:

[0001] The invention relates to a novel rubber-modified solidified soil and a preparation and construction method thereof, belonging to the technical field of civil engineering and road engineering. (two) background technology:

[0002] The solidified soil prepared by mixing cement, lime and other cementitious materials with soil is widely used in the base course of medium and low-grade roads or the cushion of high-grade roads in my country. The solidified soil has the disadvantages of high brittleness, easy shrinkage and cracking, and poor fatigue resistance. The invention adds rubber particles or rubber fibers made of waste rubber such as discarded tires to the solidified soil, which can improve the brittleness of the solidified soil, improve its fatigue resistance, crack resistance and durability, and reduce the apparent appearance of the solidified soil. density.

[0003] Waste rubber is called "black pollution", and the main source is discarded ca...

Examples

Embodiment 1

[0025] A kind of rubber modified solidified soil of the present invention, the mass percent of its composition is:

[0026] Ordinary Portland cement 7%, soil (moisture content 10%) 80%, rubber particles 5%, rubber fiber 6%, water 2%. Lignosulfonate is 0.12% of the total mass of the above materials. Among them, the particle size of the rubber particles is 0.1 mm to 2.5 mm, and its preparation and construction methods are as follows: a soil compaction experiment is carried out indoors to determine the optimum moisture content of the soil. Sprinkle and moisten the soil so that the moisture content of the soil is near the optimal moisture content. Mix rubber particles, cement, lignin sulfonate and soil, then add water required for hydration of cementitious materials, mix evenly, then pave and roll, and sprinkle water after forming. This rubber-modified solidified soil can be used for the base course of lower-grade roads such as secondary roads.

Embodiment 2

[0028] A kind of rubber modified solidified soil of the present invention, the mass percent of its composition is:

[0029] Lime 6%, fly ash 10%, coal gangue 5%, steel slag 5%, rubber material after surface modification 6%, soil (moisture content 25%) 65%, water 3%. The rubber surface modifier uses NaOH solution. Its preparation and construction methods are as follows: firstly use NaOH solution to modify the surface of rubber particles, and mix cementitious materials such as lime, fly ash, coal gangue and steel slag evenly. Soil compaction experiments were carried out indoors to determine the optimum moisture content of the soil. Spread and dry the soil to ensure that the moisture content of the soil is near the optimum moisture content, then mix the mixed cementitious material and surface-modified rubber particles with the soil, and then add the cementitious material required for hydration Water, mix evenly, then pave and roll, and sprinkle water after forming. This rubber...

Embodiment 3

[0031] A kind of rubber modified solidified soil of the present invention, the mass percent of its composition is:

[0032] 8% cement, 2% epoxy resin, 6% rubber material after surface modification, 82% soil (moisture content 10%), and 2% water. The rubber surface modifier uses a silane coupling agent. Its preparation and construction methods are as follows: firstly, the surface of the rubber material is modified with a silane coupling agent. Soil compaction experiments were carried out indoors to determine the optimum moisture content of the soil. Sprinkle and moisten the soil so that the moisture content of the soil is near the optimal moisture content. Mix cement, modified rubber particles and soil, then add water and liquid epoxy resin required for hydration of the cementitious material, mix evenly, then pave and roll, and sprinkle water after forming. This rubber-modified solidified soil can be used for the subbase of high-grade roads or the base of lower-grade roads su...

(1) Technical field:

[0001] The invention relates to a novel rubber-modified solidified soil and a preparation and construction method thereof, belonging to the technical field of civil engineering and road engineering. (two) background technology:

[0002] The solidified soil prepared by mixing cement, lime and other cementitious materials with soil is widely used in the base course of medium and low-grade roads or the cushion of high-grade roads in my country. The solidified soil has the disadvantages of high brittleness, easy shrinkage and cracking, and poor fatigue resistance. The invention adds rubber particles or rubber fibers made of waste rubber such as discarded tires to the solidified soil, which can improve the brittleness of the solidified soil, improve its fatigue resistance, crack resistance and durability, and reduce the apparent appearance of the solidified soil. density.

[0003] Waste rubber is called "black pollution", and the main source is discarded ca...

Examples

Embodiment 1

[0025] A kind of rubber modified solidified soil of the present invention, the mass percent of its composition is:

[0026] Ordinary Portland cement 7%, soil (moisture content 10%) 80%, rubber particles 5%, rubber fiber 6%, water 2%. Lignosulfonate is 0.12% of the total mass of the above materials. Among them, the particle size of the rubber particles is 0.1 mm to 2.5 mm, and its preparation and construction methods are as follows: a soil compaction experiment is carried out indoors to determine the optimum moisture content of the soil. Sprinkle and moisten the soil so that the moisture content of the soil is near the optimal moisture content. Mix rubber particles, cement, lignin sulfonate and soil, then add water required for hydration of cementitious materials, mix evenly, then pave and roll, and sprinkle water after forming. This rubber-modified solidified soil can be used for the base course of lower-grade roads such as secondary roads.

Embodiment 2

[0028] A kind of rubber modified solidified soil of the present invention, the mass percent of its composition is:

[0029] Lime 6%, fly ash 10%, coal gangue 5%, steel slag 5%, rubber material after surface modification 6%, soil (moisture content 25%) 65%, water 3%. The rubber surface modifier uses NaOH solution. Its preparation and construction methods are as follows: firstly use NaOH solution to modify the surface of rubber particles, and mix cementitious materials such as lime, fly ash, coal gangue and steel slag evenly. Soil compaction experiments were carried out indoors to determine the optimum moisture content of the soil. Spread and dry the soil to ensure that the moisture content of the soil is near the optimum moisture content, then mix the mixed cementitious material and surface-modified rubber particles with the soil, and then add the cementitious material required for hydration Water, mix evenly, then pave and roll, and sprinkle water after forming. This rubber...

Embodiment 3

[0031] A kind of rubber modified solidified soil of the present invention, the mass percent of its composition is:

[0032] 8% cement, 2% epoxy resin, 6% rubber material after surface modification, 82% soil (moisture content 10%), and 2% water. The rubber surface modifier uses a silane coupling agent. Its preparation and construction methods are as follows: firstly, the surface of the rubber material is modified with a silane coupling agent. Soil compaction experiments were carried out indoors to determine the optimum moisture content of the soil. Sprinkle and moisten the soil so that the moisture content of the soil is near the optimal moisture content. Mix cement, modified rubber particles and soil, then add water and liquid epoxy resin required for hydration of the cementitious material, mix evenly, then pave and roll, and sprinkle water after forming. This rubber-modified solidified soil can be used for the subbase of high-grade roads or the base of lower-grade roads su...