CN103936350B - A kind of concrete aerated brick of sepiolite fibre of high insulating effect - Google Patents

Abstract

The invention discloses a kind of concrete aerated brick of sepiolite fibre of high insulating effect, it is obtained by the raw material of following weight parts: cement 18-22, slaked lime 6-9, sepiolite fibre 1-2, gypsum 10-15, magnesite powder 5-6, Xylo-Mucine 1-2, benzene emulsion 1-2, concentration are hydrogen peroxide 4-6, graphene oxide 1-2, sodium aluminate 0.2-0.4, the reinforcement and filler material 5-8 of 18-20%.

Description

A concrete aerated brick made of sepiolite fiber with good thermal insulation effect

technical field

The invention relates to the field of aerated bricks, in particular to a concrete aerated brick made of sepiolite fibers with good thermal insulation effect.

Background technique

Aerated bricks are "autoclaved aerated concrete blocks", referred to as aerated bricks, which are aerated concrete blocks produced by high-temperature autoclaved equipment. "Aerated brick" can be understood as a simplified or a general name. The range of products it covers should be larger, that is, bricks produced by various other processes including autoclaving.

Sepiolite fiber is a kind of natural mineral fiber, which is a fibrous variant of sepiolite mineral, called α-sepiolite. According to experts, sepiolite, as a layered chain silicate mineral, has a layer of magnesium-oxygen octahedron sandwiched between two layers of silicon-oxygen tetrahedron in its structure, forming a 2:1 layered structural unit. The tetrahedral layer is continuous, and the direction of the active oxygen in the layer is reversed periodically. The octahedral layers form channels in which the upper and lower layers are arranged alternately. The orientation of the channel is consistent with the fiber axis, allowing water molecules, metal cations, small organic molecules, etc. to enter into it. Sepiolite has good heat resistance. Sepiolite also has good ion exchange and catalytic properties, and excellent properties such as corrosion resistance, radiation resistance, insulation, heat insulation, etc., especially the Si-OH energy in its structure and organic matter. Direct reaction to generate organic mineral derivatives.

Contents of the invention

The object of the present invention is to provide a concrete aerated brick made of sepiolite fiber with good thermal insulation effect.

The above purpose is achieved through the following schemes:

A concrete aerated brick made of sepiolite fiber with good thermal insulation effect is characterized in that it is made of the following raw materials in parts by weight: cement 18-22, slaked lime 6-9, sepiolite fiber 1-2, Gypsum 10-15, magnesite powder 5-6, sodium carboxymethyl cellulose 1-2, styrene-acrylic emulsion 1-2, hydrogen peroxide with a concentration of 18-20% 4-6, graphene oxide 1-2, aluminum Sodium acid 0.2-0.4, reinforcing filler 5-8;

The reinforcing filler is made of the following raw materials in parts by weight: clay 13-18, sepiolite powder 8-10, quartz sand 2-4, nano titanium dioxide 0.1-0.2, calcium stearate 1-2, fatty alcohol polyoxyethylene Ether 1-2, oxidized starch 1-2, silane coupling agent KH550 1-2, diethyl phthalate 1-2, phenyl glycidyl ether 1-2, tripropylene glycol diacrylate 2-3 , citric acid 1-2;

The preparation method of the reinforcing filler is to mix clay, sepiolite powder and quartz sand, then put them into hydrogen peroxide with a concentration of 18-22%, soak for 6-8 hours, take them out, wash them with deionized water, dry them, put them in Put it into a calciner and calcinate at 700-750°C for 4-6 hours, cool it, soak it in 10-12% sodium hydroxide solution for 6-8 hours, filter it out, wash it with deionized water, dry it, and mix it with other remaining The raw materials are mixed, stirred at 50-100r/min for 15-20 minutes, and then taken out.

A concrete aerated brick made of sepiolite fiber with good thermal insulation effect is characterized in that:

The preparation method is:

(1) Mix cement, sepiolite fiber, and hydrogen peroxide with a concentration of 18-20%, then add water equivalent to 2-4 times the total weight of the above raw materials, stir at 35-45°C for 10-20 minutes, and then Mix the rest of the raw materials, then add appropriate amount of water, pour into the mold, and then pre-cure at 45-50°C for 4-6 hours, demould, cut to get the block blank;

(2) Put the block blank into the reactor for autoclaving and curing for 16-18 hours, and put it in the warehouse to get the finished product.

The beneficial effects of the invention are: the invention has various ingredients and good compatibility, and the addition of sepiolite fiber improves the performance of heat insulation and anti-permeation of the invention.

Detailed ways

A concrete aerated brick made of sepiolite fiber with good thermal insulation effect, which is made of the following raw materials with a weight of kg: cement 22, slaked lime 6, sepiolite fiber 2, gypsum 15, magnesite powder 6, carboxylate Sodium methylcellulose 2, styrene-acrylic emulsion 2, hydrogen peroxide 6 with a concentration of 18-20%, graphene oxide 2, sodium aluminate 0.4, reinforcing filler 8;

The reinforcing filler is made of the following raw materials in weight kg: clay 18, sepiolite powder 10, quartz sand 4, nano-titanium dioxide 0.2, calcium stearate 2, fatty alcohol polyoxyethylene ether 1, oxidized starch 2, silane coupling Agent KH550 2, diethyl phthalate 2, phenyl glycidyl ether 2, tripropylene glycol diacrylate 2, citric acid 2;

The preparation method of the reinforcing filler is to mix clay, sepiolite powder, and quartz sand, then put them into hydrogen peroxide with a concentration of 22%, soak for 8 hours, take them out, wash them with deionized water, dry them, and put them in a calciner Calcined at 750°C for 6 hours, cooled, soaked in 10% sodium hydroxide solution for 8 hours, filtered out, washed with deionized water, dried, then mixed with other remaining raw materials, stirred at 100r/min for 20 minutes , take it out and get it.

A kind of concrete aerated brick made of sepiolite fiber with good thermal insulation effect,

The preparation method is:

(1) Mix cement, sepiolite fiber, and hydrogen peroxide with a concentration of 18-20%, then add water equivalent to twice the total weight of the above raw materials, stir at 45°C for 20 minutes, mix with the rest of the raw materials, and then Add an appropriate amount of water, pour into the mold, and then pre-cure at 48°C for 4 hours, demould, cut, and get the block blank;

(2) Put the block blank into the reactor for autoclaving for 18 hours, and put it in the warehouse to get the finished product.

The average bulk density of the aerated bricks in this example is 540kg/m ³ , the thermal insulation performance is good, and the average compressive strength is 9.5MPa.

Claims (2)

1. a concrete aerated brick for the sepiolite fibre of high insulating effect, is characterized in that: it is obtained by the raw material of following weight parts: cement 18-22, slaked lime 6-9, sepiolite fibre 1-2, gypsum 10-15, magnesite powder 5-6, Xylo-Mucine 1-2, benzene emulsion 1-2, concentration are hydrogen peroxide 4-6, graphene oxide 1-2, sodium aluminate 0.2-0.4, the reinforcement and filler material 5-8 of 18-20%; Reinforcement and filler material is made up of the raw material of following weight part: clay 13-18, sepiolite powder 8-10, quartz sand 2-4, nano titanium oxide 0.1-0.2, calcium stearate 1-2, fatty alcohol-polyoxyethylene ether 1-2, Sumstar 190 1-2, Silane coupling agent KH550 1-2, diethyl phthalate 1-2, phenyl glycidyl ether 1-2, tri (propylene glycol) diacrylate 2-3, citric acid 1-2; The preparation method of reinforcement and filler material is by clay, sepiolite powder, quartz sand mixing, then puts into the hydrogen peroxide that concentration is 18-22%, soaks 6-8 hour, take out, deionized water wash, dry, put into calcining furnace and calcine 4-6 hour at 700-750 DEG C, cooling, putting into concentration is that 10-12% sodium hydroxide solution soaks 6-8 hour, filter and take out, deionized water wash, dry, mix with other surplus stock again, stir 15-20 minute under 50-100r/min after, take out, to obtain final product.

2. the concrete aerated brick of the sepiolite fibre of a kind of high insulating effect according to claim 1, is characterized in that: preparation method is:

(1) by cement, sepiolite fibre, concentration be the hydrogen peroxide mixing of 18-20%, add again and be equivalent to above-mentioned raw materials gross weight 2-4 water doubly, 10-20 minute is stirred at 35-45 DEG C, with all the other raw material blendings, then add suitable quantity of water, pour into the mold shaping, then precuring 4-6 hour at 45-50 DEG C, the demoulding, cutting, obtains building block base;

(2) building block base is put into reactor steam press maintenance 16-18 hour, put finished product in storage and get final product.