Process for preparing composite foamed cement

Abstract

The invention discloses a process for preparing composite foamed cement. The process comprises the following steps: premixing, namely, uniformly mixing a gel material, lightweight aggregate and a multifunctional additive, subsequently preparing the above components into premix, and storing the premix in a storage tank for later use; foaming, namely, feeding the premixed premix and hot water into a stirring tank, stirring for 5 minutes, sequentially adding a composite modifier and an oxidant into the stirring tank, and continuously stirring for 5 minutes, thereby obtaining slurry; pre-coagulating, namely, filling the foamed slurry into a mold box of a pre-coagulating kiln, simultaneously supplying hot water into the pre-coagulating kiln continuously so as to foam and expand the slurry inside the mold box, thereby preparing the composite foamed cement, and standing the composite foamed cement in the mold box for 6-8 minutes, thereby forming a composite foamed cement initial set object; and demolding and cutting, namely, demolding and cutting the pre-coagulated composite foamed cement initial set object into a plate material, thereby preparing the formed composite foamed cement. The composite foamed cement prepared by using the process is high in mechanical strength, free of foaming, high in foaming strength, rapid to coagulate and dry, short in demolding time and free of maintenance period, can save the space, the energy, the labor and the time, and can be cut in a wet manner.

Description

technical field [0001] The invention relates to a preparation method of composite foamed cement, and belongs to the field of preparation of novel materials. Background technique [0002] Composite foamed cement is a member of the concrete family. As the name implies, concrete is foamed or foamed, so it is also called foamed cement, lightweight concrete, etc. It is a waste-reducing, environmentally friendly, energy-saving, low-cost Carbon, economical, practical and non-combustible new building energy-saving materials with a fire rating of A. In recent years, both at home and abroad have attached great importance to the research and development of composite foamed cement, making it more and more widely used in the field of construction. At present, composite foamed cement is more and more widely used in building insulation materials in my country because of its good thermal insulation and fireproof characteristics, mainly including: roof insulation layer cast-in-situ, floor i...

AI Technical Summary

Problems solved by technology

Therefore, this "mechanical foaming" composite foaming cement preparation method requires a large number of turnover mold boxes when processing insulation boards; a large area of ​​turnover space is required; a large amount of transshipment labor is required; the finished product has a long turnover period and is noisy when dry cutting , dusty; From the perspective of modern enterprise standards, it is not suitable for large-scale production, low production capacity, high unit cost, does not have market competitiveness, and does not have the conditions to be widely used in the market

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