CN101323511A

CN101323511A - Fly ash bricks

Info

Publication number: CN101323511A
Application number: CNA2007100117585A
Authority: CN
Inventors: 王书金
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-06-16
Filing date: 2007-06-16
Publication date: 2008-12-17

Abstract

The invention relates to a HVFA brick, comprising the following components by weight percentage: 60 to 87 percent of wet-thin fly ash, 4 to 13 percent of low grade cement, 9 to 35 percent of aggregate and 0.02 to 0.06 percent of fly ash addictive. The wet-thin fly ash includes dry ash, wet ash and normal ash; the aggregate is fly ash raw slag or sand; the fly ash addictive consists of acrylic copolymer and water. The components are mixed evenly according to the matching proportion, and then are pressed for shaping by a shaping machine, and then after a short time steam maintaining the HVFA brick of the invention can be obtained. The invention dose not adopt lime as exciting agent so as to avoid roasting and high-pressure steam maintaining; the manufacturing process is simple and the manufacturing cost is low; the adaptability is high and the capability is better; and anti-freezing and anti-shrinking capability is high. After the test by 'National Construction Material Industry Silicate Product Quality Monitor and Inspection Center', each index of the HVFA brick meets the standard of MU20 first-class product.

Description

A kind of flyash brick

Technical field

The invention belongs to a kind of building wall material, specifically a kind of is the flyash brick of main raw material with flyash.

Background technology

With energy-conservation, economize on water, save land, novel wall material, the especially flyash brick of environmental protection replace traditional materials for wall-solid clay brick to become a long-term techno-economic policy of China.Therefore, utilize the research of flyash making building brick very general, the kind of flyash brick is also a lot.Wherein mainly contain flyash concrete holllow building block, flyash clay vitrified brick, the steam-cured autoclaved brick of flyash etc.

Chinese patent ZL02129387 discloses a kind of " sintered building brick with high flyash mixing amount and preparation method thereof ", and its component is: flyash, sodium bentonite, property-modifying additive and water.But need go into kiln fires with coal.Application number is 200310109736, and the disclosed component of denomination of invention " made from full fly ash building brick and manufacture method thereof and specialist additive " is the composite additive that contains flyash and be made of alkaline matter, wilkinite or its congener and ferriferous oxide.Its manufacture craft is through twice ageing and roll for twice.Application number 200410069516 discloses " a kind of flyash brick, mortar and production method thereof ", then be with lime as exciting agent, form by flyash, lime, gypsum, cement and aggregate.

Though above-mentioned several flyash brick respectively has its characteristics and advantage, also exist to some extent or fire or defectives such as drying shrinkage or suction, especially use and will be restricted at cold district.The patent application of application number 02133006 provides a kind of " being used for the cold district high blended quantity vapor pressed flyash brick ".Main ingredient is flyash, chicken girt, lime, gypsum etc.Because excitation material and chicken girt proportion are bigger, and need build slaking silos and autoclave, its cost of manufacture and technology are increased.

Summary of the invention

The purpose of this invention is to provide a kind of good product performance, cost is low, and manufacture craft is simple, and freeze-thaw-, drying shrinkage ability are strong, and is additive without lime, need not to fire the flyash brick with high-pressure steaming and cultivating.Its concrete technical measures are:

Flyash brick of the present invention is made up of flyash, cement, aggregate and additive.The weight part of each component is: the thin ash 60～87 of flyash, cement of low index 4～13, aggregate 9～35, flyash additive 0.06～0.12.

In the said components, the composition of flyash additive and weight part are: polypropylene copolymer 51, water 49.The thin ash of flyash is a dry ash, and cement of low index refers to cement No. 150, and aggregate is the thick slag of flyash.

The present invention is a main raw material with the thin ash of flyash, is aided with the flyash waste residue, adds a small amount of cement of low index and additive, mix the back shake molded by shaper and carry out short period of time Low Temperature Steam health after can use.Basic process steps is: metering, batching, stirring, moulding, maintenance, finished product.

Because the thin ash of flyash of the present invention can reach more than 90% with the thick total incorporation of slag, thereby the utilization of fly ash rate is high; After adding flyash additive of the present invention, make to be difficult for having produced activity, make impurity such as inorganic powder embrace to hold and mix, improved the intensity and the weather resistance of brick, reduced the crack performance that produces because of dry shrinkage with unclassified stores bonded flyash.The present invention does not add lime and other auxiliary materials, thereby raw materials cost is cheap; Mould brick need not be fired or high-pressure steaming and cultivating, and technology is simple, and cost of manufacture reduces; Construction does not have particular requirement to mortar, and is consistent with the common brick constructing operation, and construction in later period intensity continuation increase, can replace traditional clay solid brick fully.

In addition, flyash brick of the present invention passes through more mold exchange, both can produce flyash standard brick, load bearing hollow brick, non-load bearing tile, floor tile, grass planting brick and kerbstone etc., also can produce decorative colour brick.Decorative block color nature, colour-fast, have saving of labor, material-saving effect attractive in appearance again.

Embodiment

Embodiment 1

Add by weight: 60 parts of the thin ashes of flyash, 10 parts of No. 150 cement, 30 parts of the thick slags of flyash, 0.06 part of flyash additive.It is molded to be shaken by shaper after mixing, and promptly can be made into high blending flyash standard square of the present invention through the Low Temperature Steam health again.

Embodiment 2

By weight, add 70 parts of the thin ashes of flyash, 12 parts of No. 150 cement, 17.9 parts of the thick slags of flyash, 0.12 part of flyash additive.Mix after shaper shake molded, again through low temperature steam-cured the high blending flyash standard square.

Press the high blending flyash standard square that embodiment produces, through " national building materials industry silicate building products quality supervision and test test center " check, its every index test data are as follows:

Folding strength 8.5MPa; Ultimate compression strength 22MPa; Freeze back intensity 19.2MPa;

Drying shrinkage 0.32mm/m

Water-intake rate: 10.9% water ratio: 3% thermal conductivity: 1.02W

Check data shows that an index such as the folding strength of flyash brick of the present invention, ultimate compression strength, freeze-thaw resistance and drying shrinkage value all meets the requirement of intensity more than 20 grades of national building material industry " JC239-2001 standard " regulation.

Use the office building of the present invention's high blending flyash brick construction, go through trials and hardship in 9 years, outward appearance and structure are intact in the body of wall.

Claims

1, a kind of flyash brick is made up of flyash, cement, aggregate and additive, it is characterized in that, comprises following components in part by weight: the thin ash 60～87 of flyash, cement of low index 4～13, aggregate 9～35, flyash additive 0.06～0.12.

2, flyash brick according to claim 1 is characterized in that, described each component of flyash additive and weight part are: polypropylene copolymer 51, water 49.

3, flyash brick according to claim 1 is characterized in that, the thin ash of described flyash is a dry ash; Cement of low index is No. 150 cement; Aggregate is the thick slag of flyash.