Light straw concrete wall material and preparation method thereof

A concrete and straw technology, applied in the field of green building materials, can solve the problems of reducing the bulk density of the wall body and difficult to handle straw stacking, and achieve the effects of increasing the ductility, inhibiting the expansion of cracks, and reducing the basic treatment cost.

Pending Publication Date: 2019-02-19
四川省三台县波特兰商品砼有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a lightweight straw concrete wall material and its preparation method, which can solve the problem that some straws are difficult to stack, reduce the bulk density of the wall, and meet the mechanical performance requirements of the straw concrete wall material

Method used

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  • Light straw concrete wall material and preparation method thereof

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Effect test

Embodiment 1

[0035] Step 1: Cut the dried rape stalks into 2-4 cm sections, then put them into an alkali solution with a mass concentration of 3.5% and soak them for 5-10 hours for modification treatment, and then dry them in the air; Mesh-sized flocculent straw powder.

[0036] Step 2. The weight of the standard cement is 100kg according to the base mixing ratio. The cement is composed of 95% composite Portland cement and 5% fly ash. Based on the total mass of composite Portland cement and fly ash 100kg, take water as its weight 50% of straw, 1% of 4-16 mesh straw, 106% of shale ceramsite, 123% of sand, and 0% of stone. After demoulding, put the demoulded specimen into the standard curing room, and cure it for 28 days under the conditions of temperature 20±2°C and relative humidity above 95%, to obtain a new type of straw concrete wall material with a bulk density of 1434.67Kg / m 3 , 28d compressive strength reached 11.09MPa, 28d splitting strength reached 1.50MPa, 48h after water intru...

Embodiment 2

[0038] Step 1. Cut the dried rape stalks into 2-4cm pieces, soak them in 3.5% alkali solution for 5-10 hours, and then dry them in the air; turn on the pulverizer and crush the stalks into 4-mesh sized straw particles .

[0039] Step 2. The weight of the standard cement is 100kg according to the base mixing ratio. The cement is composed of 90% composite Portland cement and 10% fly ash. Based on the total mass of composite Portland cement and fly ash 100kg, take water as its weight 50% of straw, 2% of 4-16 mesh straw, 103% of shale ceramsite, 130% of sand, and 0% of stone. After demoulding, put the demoulded specimen into the standard curing room, and cure it for 28 days at a temperature of 20±2°C and a relative humidity above 95%, to obtain a new type of straw concrete wall material with a bulk density of 1236.30Kg / m3, 28d compressive strength reaches 7.81MPa, 28d splitting strength reaches 1.18MPa, 48h after water intrusion, compressive strength is 6.48MPa, softening coeffi...

Embodiment 3

[0041] Step 1: Cut the dried rape stalks into small pieces of 2 to 4 cm, soak them in 3.5% alkali solution for 5 to 10 hours, and then dry them; turn on the pulverizer and crush the straws into 4-mesh straw particles .

[0042] Step 2: The weight of standard cement is 100kg according to the base mixing ratio. The cement is composed of 85% composite portland cement and 15% fly ash. Based on the total mass of composite portland cement and fly ash 100kg, take water as its weight. 50%, 4-16 mesh straw 3%, shale ceramsite 99%, sand 136%, gravel 0%. After fully stirring and mixing, add waterproofing agent and pour in the mold; after pouring is completed, 3-5 days after condensation Remove the mold, and put the demoulded specimen into the standard curing room, and cure it for 28 days at a temperature of 20±2°C and a relative humidity above 95%, to obtain a new type of straw concrete wall material with a bulk density of 1052.15Kg / m 3 , 28d compressive strength reached 6.3MPa, 28d ant...

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Abstract

The invention provides a light straw concrete wall material and a preparation method thereof. A standard mixture ratio of water to cement to ceramsite to sand is 50:100:106:123, wherein the standard mixture ratio is only a reference standard ratio and is not adopted as an actual operation ratio. Then, with the mass percentage of the cement as the standard, 1%-3% of the straw is added, and 5%-15% of the cement is replaced with fly ash. According to the volume percentage, the replacement rate of the aggregate is 0.25% or 50%, 0.25% or 50% of the ceramsite is replaced with stones, and meanwhile,the proportion of the sand is 38% or 40% or 42%. The problem that some straw piles are difficult to dispose can be solved, the weight of a wall body is reduced, and the requirements for the mechanicalproperties of the straw concrete wall material are met at the same time.

Description

technical field [0001] The invention belongs to the field of green building materials, in particular to a preparation method of lightweight straw wall materials. Background technique [0002] The wall is the most used part in the building. The research and development of the new wall is very important. In the early days, people in the industry turned their attention to the polystyrene foam board and polyurethane foam board with excellent thermal insulation performance. From the perspective of energy saving, it can indeed make Building energy consumption is reduced, but there are many environmental protection problems. In addition to the high price, this kind of energy saving is unreasonable in terms of energy consumption in the whole process, and the transportation cost is high. [0003] my country is a large agricultural country. Straw resources have not been effectively used for a long time. As livestock feed, returning to the field or burning, livestock has a strong selec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B111/27C04B111/34
CPCC04B28/02C04B2111/00017C04B2111/27C04B2111/343C04B2201/20C04B2201/50C04B18/08C04B18/248C04B22/062C04B18/027C04B14/06C04B14/02C04B2103/65
Inventor 龙凤全褚云朋罗灿亮
Owner 四川省三台县波特兰商品砼有限公司
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