Lightweight high-strength concrete composite insulation board and preparation method thereof

Abstract

The invention discloses a lightweight high-strength foam concrete composite insulation board. A foam concrete slab is used as a main board, a sandwich in the middle is rigid foam polyurethane, and the foam concrete slab comprises the following components in parts by weight: 20-35 parts of ordinary Portland cement, 2-4 parts of ultrafine fly ash, 4-10 parts of ultrafine mineral powder, 40-60 parts of broken stones, 50-70 parts of medium sand, 1-2 parts of tri-isopropanolamine, 0.5-2.5 parts of calcium oxide, 1-3 parts of polypropylene reticular fiber, 0.8-1.6 parts of an organic additive, 3-5 parts of an HTQ-1 type foaming agent, 1-2 parts of an MPS foam stabilizer, 1.5-3 parts of a polycarboxylate superplasticizer, and 15-30 parts of water, wherein the organic additive is prepared by virtue of a dropwise adding reaction of an anionic polymer, a soluble metal salt, and soluble alkali metal silicate. The foam concrete composite insulation board is good in thermal insulation property, good in impact resistance, high in toughness, high in compression strength and low in preparation cost, and is energy-saving and environment-friendly.

Description

[0001] Technical field: [0002] The invention relates to the field of building materials, in particular to a lightweight high-strength concrete composite thermal insulation board. [0003] Background technique: [0004] In recent years, fire accidents in building thermal insulation projects have occurred frequently. The root cause is the use of organic thermal insulation materials with flammable properties. Although polystyrene board, extruded board, rigid polyurethane board and other organic thermal insulation materials have excellent thermal insulation properties, their inherent fire resistance defects have buried fire hazards for buildings, threatening the safety of people's lives and property at all times. Under the background that the building insulation market calls for fireproof and safe insulation materials, inorganic non-combustible insulation materials with both fireproof and thermal insulation properties, represented by foam concrete insulation boards, came into bei...

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Problems solved by technology

As a new type of building insulation material, the foam concrete insulation board has developed from immature to mature, from weak to strong, with continuous improvement of technical performance, continuous improvement of production and construction technology, and a complete set of preparation and application system has been formed, but there are still Many deficiencies, such as the decline in the mechanical properties of the insulation board caused by uneven foaming, improper addition of admixtures can easily cause a decline in the strength of foamed concrete in the later stage, and the durability of foamed concrete is not good