Rice straw reinforced foam concrete and method for preparing same

A foamed concrete, straw and straw technology, applied in ceramic products, other household appliances, applications, etc., can solve the problems of poor working performance, material precipitation, low strength, etc., and achieve obvious later strength growth, long-term strength stability, and initial strength. high effect

Inactive Publication Date: 2018-05-18
江苏德智重工有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a straw-reinforced foam concrete material and its preparation method, which can not only overcome the existing problems of material precipitation and poor work performance when straw is mixed into cement concrete, but also overcome the disadvantages of traditional foam concrete. The problem of low strength and easy cracking is also conducive to environmental protection and resource recycling

Method used

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  • Rice straw reinforced foam concrete and method for preparing same
  • Rice straw reinforced foam concrete and method for preparing same
  • Rice straw reinforced foam concrete and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Mix 32.5 ordinary Portland cement, fly ash, slag powder, and steel slag powder according to the following mass percentages:

[0031]

[0032] Mix the above materials evenly and grind them until the specific surface area is 400m 2 / kg. The modified rice straw fiber is wetted with 5% water of fiber mass. Pre-wet the mixing tank of the mixer to ensure that there is no clear water in the mixer. Add 32.5 parts of ordinary Portland cement, fly ash, slag powder and steel slag powder to the mixer, add 40.5 parts of tap water, and start the mixer. Stir for 300s to obtain foam concrete slurry; add animal protein foaming agent 1.2 times the volume of the foam concrete slurry to the above foam concrete slurry and continue stirring for 30 seconds, and then modify the rice straw fiber per cubic meter of foam concrete slurry The modified rice straw fiber was added in a proportion of 3kg, stirred for 30 seconds, molded, formed, and naturally cured for 28 days to obtain a foam concr...

Embodiment 2

[0035] Mix 42.5 ordinary Portland cement, fly ash, slag powder, and steel slag powder according to the following mass percentages:

[0036]

[0037] Mix the above materials evenly and grind them until the specific surface area is 380m 2 / kg. The modified rice straw fiber is wetted with 10% water of fiber mass. Pre-wet the mixing tank of the mixer to ensure that there is no clear water in the mixer. Add 42.5 parts of ordinary Portland cement, fly ash, slag powder and steel slag powder to the mixer, add 51.0 parts of tap water, and start the mixer. Stir for 280s to obtain foamed concrete slurry; add rosin foaming agent 1.4 times the volume of the foamed concrete slurry to the above foamed concrete slurry and continue stirring for 90s, and then mix the modified rice straw fibers in each cubic meter of foamed concrete slurry The modified rice straw fibers were added in a proportion of 6kg, stirred for 90 seconds, molded, formed, and naturally cured for 28 days to obtain foame...

Embodiment 3

[0040] Mix 42.5 ordinary Portland cement, fly ash, slag powder, and steel slag powder according to the following mass percentages:

[0041]

[0042] Mix the above materials evenly and grind them until the specific surface area is 450m 2 / kg. The modified rice straw fiber is wetted with 8% water of fiber mass. Pre-wet the mixing tank of the mixer to ensure that there is no clear water in the mixer. Add 42.5 parts of ordinary Portland cement, fly ash, slag powder and steel slag powder to the mixer, add 37.5 parts of tap water, and start the mixer. Stir for 120s to obtain the foamed concrete slurry; add vegetable protein foaming agent 1.3 times the volume of the foamed concrete slurry to the above-mentioned foamed concrete slurry and continue stirring for 90s, and then modify the amount of rice straw fiber per cubic meter of foamed concrete slurry The modified rice straw fiber was added at a ratio of 9kg, stirred for 60 seconds, molded, formed, and naturally cured for 28 day...

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Abstract

The invention discloses rice straw reinforced foam concrete and a method for preparing the same. The rice straw reinforced foam concrete comprises dry-basis gelling components. The dry-basis gelling components comprise, by weight, 15-75 parts of ordinary silicate cement, 10-25 parts of fly ash, 10-55 parts of mineral waste residue micro-powder, 5-15 parts of steel slag powder and the like. The method includes adding an appropriate quantity of water and foaming agents to prepare concrete slurry; adding modified rice straw fibers on the basis of the concrete slurry; carrying out mold filling, shaping and curing for 28 d to obtain the rice straw reinforced foam concrete which is reinforced and toughened foam concrete. The rice straw reinforced foam concrete and the method have the advantagesthat the rice straw reinforced foam concrete is light, heat-insulation and crack-resistant, is toughened, is quite suitable for mass concrete construction such as mine backfilling and also can be applied to producing novel wall materials, heat can be preserved by the rice straw reinforced foam concrete, dry shrinkage can be prevented, and the like.

Description

technical field [0001] The invention belongs to the technical field of new building materials, and in particular relates to a foam concrete produced from modified rice straw and a processing method thereof. Background technique [0002] Foam concrete refers to the lightweight concrete made of cement-based cementitious materials, admixtures, etc. as the main cementitious material, adding admixtures and water to make slurry, foaming with a foaming agent, pouring and curing. Compared with ordinary mortar, foam concrete has a large number of closed pores inside, so it has the characteristics of small volume density, heat insulation, heat insulation, sound insulation, earthquake resistance, fire resistance, energy saving, etc. It is widely used in roofing, heat pipes, floor heating, non- In the construction of load-bearing walls and sound insulation panels, it plays an important role in promoting my country's building energy conservation and wall material reform. Compared with or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/10C04B28/04
CPCC04B28/04C04B2111/40C04B2201/20C04B2201/50C04B18/08C04B18/142C04B18/141C04B18/24C04B38/106C04B38/0067
Inventor 李灿华尹哲学
Owner 江苏德智重工有限公司
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