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Solid waste foundation grouting material suitable for reinforcing bearing capacity of existing pile foundation and preparation method

A technology of grouting material and bearing capacity, which is applied in the fields of pile foundation reinforcement engineering, building material preparation, and comprehensive utilization of industrial solid waste, and can solve the problem of inability to efficiently improve the side friction resistance and ultimate bearing capacity of the original pile foundation, pile-soil The low strength of the cemented interface restricts the high-efficiency reinforcement of the pile foundation and other issues, and achieves the effects of saving preparation costs, high compressive strength, and alleviating ecological and environmental pollution problems

Active Publication Date: 2021-01-01
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, cement-based grout has problems such as long setting time and low pile-soil bond interface strength, which makes it impossible to effectively improve the side friction resistance and ultimate bearing capacity of the original pile foundation, thus restricting the efficient reinforcement of the original pile foundation in the reconstruction and expansion project
Although the multi-source solid waste-based grouting material has certain mechanical strength, the utilization rate of red mud is relatively low, and its performance is low, so it is not suitable for pile foundation grouting reinforcement treatment in expressway reconstruction and expansion projects

Method used

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  • Solid waste foundation grouting material suitable for reinforcing bearing capacity of existing pile foundation and preparation method
  • Solid waste foundation grouting material suitable for reinforcing bearing capacity of existing pile foundation and preparation method
  • Solid waste foundation grouting material suitable for reinforcing bearing capacity of existing pile foundation and preparation method

Examples

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Effect test

Embodiment 1

[0035] The composition and mass ratio of the solid waste base grouting material suitable for the reinforcement of existing pile foundation bearing capacity disclosed in this example: 50 parts of Bayer process red mud, 40 parts of steelmaking pig iron slag, 25 parts of limestone tailings, desulfurized gypsum 15 parts, 40 parts of activator. Activator components and mass ratio are 25 parts of potassium hydroxide aqueous solution with a concentration of 16%, 20 parts of carbide slag, and 15 parts of quicklime. The admixture components and mass ratio are 8 parts of 8604 low-alkali quick-setting agent, 11 parts of alunite expansion agent, 8 parts of calcium chloride, 4 parts of polyacrylamide, and 8 parts of sodium lignosulfonate.

[0036] Corresponding preparation method: Stir the red mud, blast furnace slag, and limestone tailings synergistically desulfurized gypsum ground to a specific specific surface area for 120s in a dry state, add the corresponding proportion of activator a...

Embodiment 2

[0040] The composition and mass ratio of the solid waste base grouting material suitable for the reinforcement of existing pile foundation bearing capacity disclosed in this example are: 70 parts of Bayer process red mud, 20 parts of special pig iron slag, 10 parts of limestone tailings, and desulfurized gypsum 10 parts, 15 parts of activator, 10 parts of admixture. Activator components and mass ratios are 15 parts of potassium hydroxide aqueous solution with a concentration of 8%, 10 parts of carbide slag, and 5 parts of quicklime. The admixture components and mass ratio are 4 parts of 782-type low-alkali quick-setting agent, 6 parts of calcium sulfoaluminate expansion agent, 6 parts of sodium nitrite, 1 part of carrageenan, and 2 parts of casein.

[0041] The preparation method corresponding to this example: stir red mud, blast furnace slag, limestone tailings and desulfurized gypsum in a dry state for 120s in a dry state, add corresponding proportion of activator and admixt...

Embodiment 3

[0044] The composition and mass ratio of the solid waste base grouting material suitable for the reinforcement of existing pile foundation bearing capacity disclosed in this example are: 60 parts of sintering red mud, 35 parts of casting pig iron slag, 20 parts of limestone tailings, and desulfurized gypsum 18 parts, 25 parts of activator, 22 parts of admixture. Activator components and mass ratios are 20 parts of potassium hydroxide aqueous solution with a concentration of 12%, 18 parts of carbide slag and 12 parts of quicklime. The admixture components and mass ratio are 3 parts of 7Ⅱ type quick-setting agent, 10 parts of calcium sulfoaluminate expansion agent, 7 parts of calcium sulfate, 3 parts of carboxymethyl cellulose, and 6 parts of melamine-based water reducer.

[0045] The preparation method corresponding to this example: stir red mud, blast furnace slag, limestone tailings and desulfurized gypsum in a dry state for 120s in a dry state, add corresponding proportion o...

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Abstract

The invention discloses a solid waste foundation grouting material suitable for reinforcing the bearing capacity of an existing pile foundation and a preparation method of the solid waste foundation grouting material. Red mud is adopted as a main material and cooperates with other multi-source solid waste, potassium hydroxide, carbide slag and quick lime are adopted as excitants, and the multi-source solid waste foundation grouting material suitable for reinforcing the bearing capacity of an existing pile foundation of reconstruction and extension engineering is prepared. The preparation method is simple, and the prepared grouting material is short in setting time, high in early strength, large in expansion coefficient, high in pile-soil interface cementing strength, suitable for reinforcing the bearing capacity of an existing pile foundation, capable of guaranteeing safety construction of highway reconstruction and extension projects, relieving solid waste stacking pressure and solving the problem of environmental pollution caused by red mud and suitable for large-scale popularization and application. And high-added-value comprehensive utilization of solid waste is promoted.

Description

technical field [0001] The invention relates to a grouting material suitable for reinforcing the bearing capacity of existing pile foundations of reconstruction and expansion projects prepared by using multi-source solid waste as the main raw material, and belongs to the technical fields of pile foundation reinforcement engineering, building material preparation, and comprehensive utilization of industrial solid waste. Background technique [0002] The expressways built in the early days of our country were mainly two-way four-lane. With the development of the national economy, the number of traffic operation vehicles is increasing day by day. The contradiction between the traffic capacity of the original expressway and the rapidly growing traffic demand has become increasingly prominent. Reconstruction and expansion of highways has become a new normal in the development of transportation construction. For this, it is necessary to do a good job in highway reconstruction and e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14
CPCC04B28/144C04B2111/00017C04B2201/50C04B18/0409C04B18/141C04B18/12C04B2103/12C04B2103/10C04B2103/44C04B2103/302C04B22/062C04B22/0006C04B22/064C04B22/14
Inventor 李召峰张晨林春金陈迪杨张健
Owner SHANDONG UNIV
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