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Light foam concrete used for road and bridge filing and preparing method thereof

A lightweight foam and concrete technology, applied in the field of engineering materials, can solve problems such as poor economy and long construction period, and achieve the effects of improving atmospheric environment, reducing pollution and improving work performance

Inactive Publication Date: 2017-07-07
CHANGZHOU YINENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional solution is to increase the bearing capacity of the foundation, which is not only difficult to solve the problem fundamentally, but also has problems such as long construction period and low economic efficiency.

Method used

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  • Light foam concrete used for road and bridge filing and preparing method thereof
  • Light foam concrete used for road and bridge filing and preparing method thereof
  • Light foam concrete used for road and bridge filing and preparing method thereof

Examples

Experimental program
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preparation example Construction

[0033] The preparation method of the geopolymer cement is: pre-grinding the steel slag to a particle size of 100-150m 2 / kg, adding retarder and mineralizer to it, and then further grinding to a particle size of 310-560m 2 / kg to obtain geopolymer cement products. The weight of the retarder is 0.1-0.5% of the weight of the steel slag, and the weight of the mineralizer is 3.5-10.5% of the weight of the steel slag. The retarder is one or a combination of phosphogypsum, citrate gypsum, desulfurized gypsum and fluorogypsum. The mineralizer is a mineralized mixture formed by one or more of kaolin, bentonite, sepiolite and alkaline substances at 850-1100°C for 25-95 minutes, wherein kaolin, bentonite, sea The weight ratio of one or several compositions in the foam stone to the alkaline substance is 0.2-4.5:1. The alkaline substance is one or more of sodium hydroxide, potassium hydroxide, potassium carbonate, sodium bicarbonate, sodium carbonate, potassium bicarbonate.

[0034] T...

Embodiment 1

[0042] Mix and stir 58 parts of geopolymer cement and 42 parts of fly ash evenly, then add 23 parts of water, and stir to form a uniform and stable slurry; then continue to add 5 parts of physical foam to the slurry, stir evenly, and the stirring time is 10 minutes ; After mixing evenly, carry out the filling construction work.

[0043] The dry density of the foamed concrete obtained in this embodiment is 1046kg / m 3 , The 28-day compressive strength is 9.2MPa, and the thermal conductivity is 0.19W / (m·K).

Embodiment 2

[0045] Mix and stir 64 parts of geopolymer cement and 36 parts of blast furnace granulated slag powder evenly, then add 32 parts of water, and stir to form a uniform and stable slurry; then continue to add 4 parts of physical foam to the slurry, stir evenly, and the mixing time for 5 minutes; after stirring evenly, carry out the filling construction work.

[0046] The dry density of the foamed concrete obtained in this embodiment is 871kg / m 3 , The 28-day compressive strength is 6.7MPa, and the thermal conductivity is 0.16W / (m·K).

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Abstract

The invention discloses light foam concrete used for road and bridge filing and a preparing method thereof. The foam concrete is light in weight, higher in strength than common backfill materials and convenient to construct as the foam concrete is flowable plastic body during construction, uses a great deal of industrial solid waste such as steel slag, mineral waste residue and flyash and plant straw fiber and has remarkable economic, environment-friendly and social benefits. The light foam concrete is obtained through the following scheme that geopolymer cement, mineral admixtures, additives and modified plant straw fiber are mixed and stirred uniformly, an appropriate amount of water is added, and the materials are stirred into uniform and stable slurry; a foaming agent continues to be added into the slurry and stirred uniformly, and the stirring time is 5-10 min; filling construction work is carried out after uniform stirring.

Description

technical field [0001] The invention belongs to the field of engineering materials, in particular to a lightweight foam concrete used for road and bridge filling and a preparation method thereof. Background technique [0002] In the construction of bridges requiring high fill, low compression ratio soil (such as crushed stone soil or gravel soil) is routinely used for the abutment back of the road-bridge junction, the soft connection under the main bridge and the approach bridge, etc. For filling. During construction, every time a certain amount of soil is filled, it needs to be rolled and compacted. After the compactness reaches the design requirements, the next layer of filling, rolling and compacting is carried out. After the filling reaches the design level, it takes a long time. The pavement structure layer can only be laid during the post-construction settlement period (a few months, half a year or more than a year). Due to the long post-construction settlement perio...

Claims

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Application Information

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IPC IPC(8): C04B38/10C04B28/00C04B18/24C04B20/04C04B18/08C04B18/14
CPCC04B18/08C04B18/141C04B18/24C04B20/04C04B28/006C04B38/106C04B2201/20C04B2201/32C04B2201/50C04B38/0067C04B22/002C04B2103/0068C04B2103/302Y02P40/10Y02W30/91
Inventor 尹哲学高波程远志靳洪波江新卫庞华果其他发明人请求不公开姓名
Owner CHANGZHOU YINENG TECH
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