Self-insulating wall ceramsite concrete and preparation method thereof

Abstract

The invention discloses self-insulation-wall ceramsite concrete. The self-insulation-wall ceramsite concrete comprises, by weight, 300-750 parts of ceramsite, 250-500 parts of cement, 50-200 parts of coal ash, 400-800 parts of sand, 120-150 parts of water, 1-3 parts of a polycarboxylate superplasticizer and 1-3 parts of fiber; the ceramsite is treated with pretreatment pulp which is (4-7):4:(3-6) in mass ratio of cement to coal ash to water. The invention further discloses a preparation method of the self-insulation-wall ceramsite concrete. The preparation method mainly includes pretreatment of the ceramsite, mixing and dry stirring of the pretreated ceramsite, sand and fiber and mixing and stirring by adding residual cement, water, coal ash and polycarboxylate superplasticizer. Through pretreatment of the ceramsite, water absorption of the ceramsite is lowered, workability of the concrete is improved, strength of the ceramsite is improved, concrete strength of the creamsite is further improved, optional scope of the creamsite is enlarged, and the ceramsite with small bulk density and good insulation property can be selected.

Description

technical field [0001] The present invention relates to a kind of concrete, especially relates to a kind of ceramsite concrete of self-insulation wall body, also relates to its preparation method. Background technique [0002] Green energy saving is the current development direction of the construction industry. Lightweight aggregate concrete can not only reduce the weight of the structure, but also improve the thermal insulation performance, and is widely used in the field of building energy conservation. As an important medium for heat transfer between the building and the outside world, the building exterior wall directly determines the overall thermal insulation performance of the building. At present, the external wall usually adopts internal insulation, external insulation, sandwich insulation and other methods to achieve the overall insulation effect, which is not only complicated and cumbersome, but also has inconsistent life expectancy between the insulation materia...

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Problems solved by technology

At present, the external wall usually adopts internal insulation, external insulation, sandwich insulation and other methods to achieve the overall insulation effect, which is not only complicated and cumbersome, but also has inconsistent life expectancy between the insulation material and the wall, and the adhesion of different materials; another kind The development trend is to develop wall self-insulation materials, which are made by adding ceramsite to concrete, but this self-insulation wall material often has the defect of insufficient strength, so how to enhance the self-insulation wall material Strength is the focus of current research. For example, Chinese patent CN103641415A discloses a high-strength, crack-resistant ceramsite concrete, which consists of 84-89 parts of component A, 10-15 parts of component B, and 0.8-1.2 parts of component C. The said component A is composed of 19-20 parts of cement, 6-8 parts of water, 28-30 parts of sand and 25-35 parts of stones, and the said component B is ceramsite, wherein the components A and B consist of Concrete, stones in concrete are replaced by 40-60% volume of ceramsite; component C is fiber, this patented technology selects high-strength ceramsite (its cylinder compressive strength is greater than 6MPa, according to "Light Aggregate and Its Test Method Part 1 (GBT17431.1-2010) "It can be known that the ceramsite with a bulk density of 600 grades and a strength of 4MPa or more is a high-strength ceramsite) to make the self-insulating wall material obtain good thermal insulation effect and good compressive strength; China Patent CN 104016641A discloses a light-weight, high-strength, pumpable LC35 concrete, and its unilateral dosage ratio (kg / m3) is as follows: cement 280-330, fly ash 90-110, slag fine powder 70-90, fineness mold The natural medium sand with a number of 2.3-2.5 is 650-700, the ceramsite is 330-370, the admixture is 5.28-6.24, and the mixing water is 170-175; the cylinder compressive strength of ceramsite is required to be greater than 6.5MPa, and high-strength ceramsite is also selected Granules to make the wall material meet the requirements of thermal insulation and load-bearing effect

The above-mentioned self-insulating wall materials have great limitations in the selection of raw material sources, and the cost of raw materials is relatively high. At the same time, due to the selection of high-strength ceramsite, its own bulk density increases, and the thermal insulation performance will decrease accordingly

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