Method for steaming and curing a fly ash aerated concrete slab
A technology for aerated concrete slabs and fly ash, which is used in applications, ceramic molding machines, household appliances, etc., can solve problems such as steam curing cracks, differences in expansion of aerated concrete bodies and steel bars, and reduce the crack rate of finished products. The effect of improving the efficiency of steam curing operation and improving the qualified rate of finished products
Inactive Publication Date: 2015-08-26
TAIYUAN IRON & STEEL GROUP
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Problems solved by technology
[0004] In order to overcome the problem of steam curing cracks in fly ash aerated concrete slabs in the existing method of steam curing of fly ash aerated concrete slabs, the present invention provides a fly ash aerated concrete slab that significantly reduces the crack rate of finished products and improves the qualified rate of finished products. Steam curing method of air concrete slab
[0005] The invention solves the problem of expansion difference between the aerated concrete body and the steel bar when the board is steamed by adding magnesite (the main component is MgO), reduces the crack rate of the finished product, improves the pass rate of the finished product, and thus reduces the production cost
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment
[0041] This embodiment includes the following steps in sequence:
[0042] Ⅰ Test the properties of magnesite
[0043] After testing, the content of MgO in the magnesite of this embodiment is 94.2%, the digestion speed of magnesite is 4 hours and 16 minutes, the digestion temperature of magnesite is 56.7°C, and the volume expansion of magnesite after digestion is 16.4 %.
[0044] The measured performance part data can meet the requirements.
[0045] Ⅱ ingredients
[0046] Adding magnesite to fly ash air-entrained concrete will increase the volume of magnesite after digestion.
[0047] Weigh out the fly ash slurry (including desulfurized gypsum), cement, quicklime, magnesite and aluminum powder according to the following mass ratio:
[0048] Fly ash 3000; Cement 200; Quicklime 600;
[0049] Lingite 30; Aluminum powder 2.5;
[0050] Considering the digestion loss of magnesite in the mixed slurry, the amount of magnesite was increased by 7%, and the actual added m...
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The invention relates to a method for steaming and curing a fly ash aerated concrete slab, which comprises the steps of mixing, pouring, boring, rest aeration, turning, cutting, steaming and curing according to the requirements of production ratio of the fly ash aerated concrete slab, and is characterized by comprising detecting (b) I ( / b) and mixing (b) II ( / b), wherein the performance of magnesia is detected before center control mixing, the content of chemical components of magnesium oxide (MgO) in the magnesia is not smaller than 90%, the digestion speed of the magnesia is 3-5 hours, the digestion temperature of the magnesia is 50-60 DEG C, and the volume swelling amount of the magnesia after digesting is 15%-20%. The magnesia is added into fly ash aerated concrete, and the volume of the magnesia is increased after digesting. The method for steaming and curing the fly ash aerated concrete slab obviously reduces cracking rate of finished products, and improves percent of pass of the finished products.
Description
technical field [0001] The invention relates to a steam curing method for a fly ash aerated concrete slab. Background technique [0002] The fly ash aerated concrete slab is made of fly ash, quicklime, cement, aluminum powder, and desulfurized gypsum as the main raw materials. Mesh, a new type of wall building material with a certain strength. The production of fly ash aerated concrete slabs can not only make full use of fly ash (the amount of fly ash added can reach 70%), but also the finished product is light in weight, high in strength, convenient in construction, and has good fire prevention, sound insulation, heat preservation and other properties. It has a broad application market and high added value. [0003] Compared with the traditional fly ash air-entrained concrete block, the production process of fly ash aerated concrete slabs has added links of inserting and pulling out brazing, making the production process more difficult to control, and steam-cured cracks a...
Claims
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Login to View More IPC IPC(8): C04B38/02C04B28/10B28B11/24
Inventor 李院高胡荣建
Owner TAIYUAN IRON & STEEL GROUP