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Light aggregate concrete pumping agent

A light aggregate concrete and pumping agent technology, applied in the field of pumping agent, can solve the problems of low success rate, short pumping distance, unsatisfactory effect of light aggregate concrete, etc.

Inactive Publication Date: 2008-03-19
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method does not significantly improve the homogeneity of concrete, and it is difficult to accurately control the degree of pre-wetting of light aggregate concrete, so that the success rate of continuous pumping construction of light aggregate concrete is very low, and the pumping distance is relatively short
Existing pumping agents are mainly developed for ordinary bulk density concrete, and the effect of applying to light aggregate concrete is not ideal

Method used

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  • Light aggregate concrete pumping agent

Examples

Experimental program
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Effect test

Embodiment 1

[0046] A light aggregate concrete pumping agent, prepared by putting 0.8kg of cellulose ether, 0.1kg of polyethylene oxide, 1kg of sodium dodecylsulfonate, 5kg of lignin fiber, and 13kg of silica fume into a mixer for 240 seconds . The cellulose ether is methyl hydroxyethyl cellulose ether with a viscosity of 30,000-50,000mPa·S; the molecular weight of the polyethylene oxide is 500,000-1,000,000, and the lignin fibers are flocculent lignin fibers. Described sodium dodecylsulfonate is commercially available technical pure sodium dodecylsulfonate, and the specific surface area of ​​described silica fume is 10000-25000m 2 / kg.

[0047] When in use, first weigh 1.12kg of the pumping agent, and when stirring, first put all the raw materials (Table 9) into the mixer in any order, and then stir for more than 3 minutes to obtain light aggregate concrete. The concrete mix ratio and properties are shown in the table. 9. Table 10. Table 11 is the lightweight aggregate concrete without...

Embodiment 2

[0055] Embodiment 2: A kind of light aggregate concrete pumping agent, by cellulose ether 1kg, polyoxyethylene 0.2kg, lignin fiber 10kg, sodium lauryl sulfonate 1.5kg, silica fume 14kg, drop into single horizontal axis to force Prepared by blending in a blender for 240 seconds. The cellulose ether is methyl hydroxypropyl cellulose ether with a viscosity of 30,000-50,000mPa·S; the molecular weight of the polyethylene oxide is 500,000-1,000,000, and the lignin fibers are flocculent lignin fibers. Described sodium dodecylsulfonate is commercially available technical pure sodium dodecylsulfonate, and the specific surface area of ​​described silica fume is 10000-25000m 2 / kg.

[0056] When in use, first weigh 2kg of the pumping agent, and when stirring, first put all the raw materials (Table 12) into the mixer in any order, and then stir for more than 3 minutes to obtain light aggregate concrete. The concrete mix ratio and properties are shown in Table 12 respectively. , Table 13...

Embodiment 3

[0064] Embodiment 3: A kind of light aggregate concrete pumping agent, by cellulose ether 1.1kg, polyoxyethylene 0.4kg, lignin fiber 3kg, upper dialkyl sodium sulfonate 0.5kg, silica fume 15kg, drop into single horizontal shaft Prepared by blending in a forced blender for 240 seconds. The cellulose ether is methyl hydroxyethyl cellulose ether with a viscosity of 30,000-50,000mPa·S; the molecular weight of the polyethylene oxide is 500,000-1,000,000, and the lignin fibers are flocculent lignin fibers. Described sodium dodecylsulfonate is commercially available technical pure sodium dodecylsulfonate, and the specific surface area of ​​described silica fume is 10000-25000m 2 / kg.

[0065] When in use, first weigh 2kg of the pumping agent, and when stirring, first put all the raw materials (Table 15) into the mixer in any order, and then stir for more than 3 minutes to obtain light aggregate concrete. The concrete mix ratio and properties are shown in Table 15 respectively. , Ta...

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Abstract

The invention relates to a pumping aid in pumping delivery of lightweight aggregate concrete. A lightweight concrete pumping aid is characterized by having a homogeneous mixture made of cellulose ether, polyethylene oxide, methyl cellulose, sodium dodecyl sulfate and siliceous dust, wherein the formulated rate is arranged by weight as: 8-12 portions of cellulose ether, 1-5 portions of polyethylene oxide, 30-300 portions of methyl cellulose, 5-15 portions of sodium dodecyl sulfate and 100-300 portions of siliceous dust. The pumping aid is used for delivery of lightweight aggregate concrete, which can dramatically improve the homogeneousness of lightweight aggregate concrete, reduce the gradual loss in slump of lightweight aggregate concrete, reduce the performance loss in the process of pumping up lightweight aggregate concrete and improve pumping capacity of lightweight aggregate concrete, thereby having a tremendous market potential in the construction of large-span bridges, high-rise buildings and special structures.

Description

technical field [0001] The invention relates to a pumping agent suitable for pumping light aggregate concrete. technical background [0002] With the rapid development of my country's construction industry and the acceleration of infrastructure construction, lightweight aggregate concrete is widely used in various projects due to its light weight, high strength, thermal insulation, sound insulation, and earthquake resistance. The development of lightweight aggregate concrete is considered to be the main way to reduce the weight of the structure and make the concrete develop in the direction of light weight and high strength. [0003] However, the density of light aggregate is lower than that of cement stone, and light aggregate is very easy to float to the surface of concrete under the condition of improper proportion design or construction control. Moreover, the light aggregate will absorb water from the cement slurry during pumping, which will cause the performance of the...

Claims

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Application Information

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IPC IPC(8): C04B24/38C04B24/26C04B24/16C04B14/06C04B16/06
CPCC04B40/0039C04B2111/00146C04B28/02Y02W30/91C04B16/0675C04B18/027C04B18/146C04B24/10C04B24/281C04B24/383
Inventor 王发洲胡曙光丁庆军周宇飞王涛
Owner WUHAN UNIV OF TECH
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