CN103708797A - Crack-resistant thermal insulation mortar - Google Patents

Abstract

The invention discloses crack-resistant thermal insulation mortar which consists of the following raw materials in parts by weight: 35-45 parts of common Portland cement, 20-30 parts of Mullite sand, 5-10 parts of diatomite, 4-8 parts of desulfurized fly ash, 3-6 parts of talcum powder, 40-50 parts of glass beads, 3-5 parts of micro-calcium silicate, 2-3 parts of polypropylene fiber, 1-2 parts of polyester fiber, 2-3 parts of polyvinyl acetate homopolymerization rubber powder, 0.4-0.8 part of hydroxyethyl cellulose ether, 3-5 parts of sodium polyacrylate, 2-3 parts of calcium lignosulphonate, 0.3-0.5 part of naphthalene water reducer and 4-6 parts of thermal insulation particles. The thermal insulation mortar is excellent in performance, can overcome the common problems such as cracking and flakes, is high in bonding strength and high in adhesive force, has excellent performances such as high thermal insulation property, weather resistance, high fire and water resistance and freezing resistance and is wide and readily available in raw material source, low in production cost, convenient in construction and wide in application prospect.

Description

Anti-cracking heat insulation mortar

Technical field

The present invention relates to a kind of anti-cracking heat insulation mortar, belong to building material field.

Background technology

Thermal insulation mortar is to take various light materials as aggregate, take cement as gelating material, admix some property-modifying additives, through manufacturing enterprise, be uniformly mixed and a kind of premixing dry-mix of making, be mainly used in constructing a kind of material of construction of building surface thermal insulation layer, there is the features such as energy-conserving profit waste, heat insulating, ageing-resistant excellent properties and cheap, easy construction, have the market requirement widely.Thermal insulation mortar is in the market of a great variety, and spread in performance is uneven, and most of thermal insulation mortars still exist the poor deficiency of splitting resistance, easily occur cracking phenomena.

Summary of the invention

The object of the invention is for the deficiencies in the prior art, and a kind of anti-cracking heat insulation mortar of anti-cracking performance excellence is provided.

For achieving the above object, the technical solution used in the present invention is as follows:

An anti-cracking heat insulation mortar, is comprised of the raw material of following weight part: ordinary Portland cement 35-45, do not come sand 20-30, diatomite 5-10, desulphurize fly ash 4-8, talcum powder 3-6, glass bead 40-50, microporous calcium silicate 3-5, polypropylene fibre 2-3, trevira 1-2, polyvinyl acetate (PVA) homopolymerization rubber powder 2-3, hydroxyethyl ether cellulose 0.4-0.8, sodium polyacrylate 3-5, calcium lignin sulphonate 2-3, naphthalene water reducer 0.3-0.5, heat-insulating granules 4-6;

The preparation method of described heat-insulating granules is as follows: a, take rhombspar, flint clay, fibrolite, volcanics mix by weight 4-8:3-5:2-3:1, pulverize, wet ball grinding 12-24h, dry, be placed in 860-920 ℃ of temperature lower calcination 1-2h, be cooled to room temperature, then adding concentration is that in the hydrochloric acid soln of 10-15%, heating in water bath is to 80-90 ℃, insulation 20-30min, taking-up is washed with distilled water to neutrality, dries, then is placed in 1180-1240 ℃ of temperature lower calcination 0.5-1h, shrend, obtain saccharoid, dry, stand-by; B, to get the solid content that is equivalent to saccharoid weight 15-20% be 40-45% Nano silica sol, add the asbestos powder of 5-8%, the rice hull ash of the nanometer vermiculite powder of 4-6%, 3-4%, the cinder powder of 2-3%, the Sodium hexametaphosphate 99 of 1-2% and the polyoxyethylene of 2-3%, after stirring, add the above-mentioned saccharoid making, stir, dry.

Using method: above-mentioned raw materials is mixed, then by weight 1: the ratio of 1.2-1.6 can be used after mortar dry powder and water are stirred.

Beneficial effect of the present invention:

Thermal insulation mortar resistance to cleavage of the present invention is excellent, can overcome the common faults such as thermal insulation mortar ftractures, flakes, and cohesive strength is high, strong adhesion, have the performances such as good heat insulation property, weathering resistance, fire-proof and water-proof, frost resistance, raw material sources are extensively easy to get, and production cost is low, easy construction, has a extensive future.

Embodiment

An anti-cracking heat insulation mortar, is comprised of the raw material of following weight (kg): ordinary Portland cement 40, do not come sand 25, diatomite 8, desulphurize fly ash 6, talcum powder 4, glass bead 45, microporous calcium silicate 4, polypropylene fibre 2, trevira 1, polyvinyl acetate (PVA) homopolymerization rubber powder 2, hydroxyethyl ether cellulose 0.6, sodium polyacrylate 4, calcium lignin sulphonate 2, naphthalene water reducer 0.4, heat-insulating granules 5;

The preparation method of described heat-insulating granules is as follows: a, take rhombspar, flint clay, fibrolite, volcanics mix by weight 7:5:3:1, pulverize wet ball grinding 24h, dry, be placed in 920 ℃ of temperature lower calcination 1h, be cooled to room temperature, then adding concentration is in 15% hydrochloric acid soln, heating in water bath to 90 ℃, insulation 20min, taking-up is washed with distilled water to neutrality, dries, then is placed in 1240 ℃ of temperature lower calcination 0.5h, shrend, obtain saccharoid, dry, stand-by; B, to get the solid content that is equivalent to saccharoid weight 20% be 45% Nano silica sol, add 8% asbestos powder, 6% nanometer vermiculite powder, 4% rice hull ash, 3% cinder powder, 2% Sodium hexametaphosphate 99 and 3% polyoxyethylene, after stirring, add the above-mentioned saccharoid making, stir, dry.

Using method: above-mentioned raw materials is mixed, can use after then by weight the ratio of 1: 1.4, mortar dry powder and water being stirred.

The performance perameter of the thermal insulation mortar that the present embodiment is produced sees the following form.

Project	Measure unit	Measured value
			Thermal conductivity	W/（m·k）	0.036
28d cohesive strength	MPa	2.5
			28d ultimate compression strength	MPa	34
Linear shrinkage	%	0.23
			Coefficient of softening	—	0.94
Splitting resistance	—	The following flawless of 5mmm

Claims (1)

1. an anti-cracking heat insulation mortar, it is characterized in that, by the raw material of following weight part, formed: ordinary Portland cement 35-45, do not come sand 20-30, diatomite 5-10, desulphurize fly ash 4-8, talcum powder 3-6, glass bead 40-50, microporous calcium silicate 3-5, polypropylene fibre 2-3, trevira 1-2, polyvinyl acetate (PVA) homopolymerization rubber powder 2-3, hydroxyethyl ether cellulose 0.4-0.8, sodium polyacrylate 3-5, calcium lignin sulphonate 2-3, naphthalene water reducer 0.3-0.5, heat-insulating granules 4-6;

The preparation method of described heat-insulating granules is as follows: a, take rhombspar, flint clay, fibrolite, volcanics mix by weight 4-8:3-5:2-3:1, pulverize, wet ball grinding 12-24h, dry, be placed in 860-920 ℃ of temperature lower calcination 1-2h, be cooled to room temperature, then adding concentration is that in the hydrochloric acid soln of 10-15%, heating in water bath is to 80-90 ℃, insulation 20-30min, taking-up is washed with distilled water to neutrality, dries, then is placed in 1180-1240 ℃ of temperature lower calcination 0.5-1h, shrend, obtain saccharoid, dry, stand-by; B, to get the solid content that is equivalent to saccharoid weight 15-20% be 40-45% Nano silica sol, add the asbestos powder of 5-8%, the rice hull ash of the nanometer vermiculite powder of 4-6%, 3-4%, the cinder powder of 2-3%, the Sodium hexametaphosphate 99 of 1-2% and the polyoxyethylene of 2-3%, after stirring, add the above-mentioned saccharoid making, stir, dry.