CN105585331A - Light-weight heat-preservation solid-waste-sintered brick - Google Patents

Abstract

The invention relates to a light-weight heat-preservation building material, and discloses a light-weight heat-preservation sintered brick made of solid waste. Pore agents 2-4 and admixtures 3-5. The pore-forming agent is one or two kinds of straw powder and rice husk powder, and the powder is pulverized with a diameter of less than 2mm. The additive is quicklime powder, and the diameter is less than 1mm after being pulverized by a ball mill. Mix urban sludge, river silt, pore-forming agent and admixture evenly in proportion, then age, form, dry and sinter to obtain light-weight thermal insulation fired bricks. The preparation process is simple, and the prepared lightweight thermal insulation fired bricks have Good thermal insulation performance and strength realize the recycling of solid waste and meet the needs of building energy conservation.

Description

A kind of light insulation solid waste sintered brick

technical field

The invention relates to a lightweight thermal insulation building material, in particular to a lightweight sintered brick from urban sludge and river channel sludge and a preparation method thereof. The utility model is suitable for a wall body of a building and belongs to the technical field of civil engineering and building materials.

Background technique

my country's industry is gradually developing in the direction of conservation, energy saving, emission reduction, and low carbon. At present, in order to save land resources, the country has banned the production of clay bricks. With the implementation of my country's wall material reform and building energy-saving policies, modern buildings require the use of new building energy-saving features such as energy saving, heat preservation, light weight, and waste utilization. Materials, and lightweight sintered bricks are just a multifunctional material that embodies energy saving, thermal insulation, heat insulation, fire resistance and other properties. Lightweight sintered bricks are playing an increasingly important role in the field of building energy conservation. In recent years, both at home and abroad have attached great importance to the research and development of lightweight sintered bricks. Chinese patent document CN101717238B discloses a light-weight thermal insulation solid waste sintered brick. The crushed construction waste, mud cake after mud pressing and leather factory Waste coal cinder is used as aggregate, and a certain proportion of polystyrene particles and reinforcing agent are added for sintering. CN102515686A discloses a light-weight wall material produced on site, which is composed of fly ash, cement, ceramsite, ceramsite, amide, expanded perlite, slag, silica fume, water reducing agent, expansion agent, water glass and water The mix ratio is made. The application number is 201310385451.7, which discloses a method for producing light-weight new wall materials by mixing coal slag, mainly using coal slag produced by thermal power plants to replace 20%-100% of sand to produce light-weight new wall materials. Although these documents have made some progress in technology, most of the raw materials used are natural materials, and the amount of solid waste utilized is small. At present, there is no report that all waste materials such as urban sludge and river silt are used to prepare wall materials.

Contents of the invention

The object of the present invention is to provide a formula for light heat preservation sintered bricks using solid waste, and the light heat preservation sintered bricks prepared have high porosity, good heat preservation performance and mechanical properties. This kind of sintered brick formula uses solid waste such as urban sludge and river silt as raw materials to solve the problem of environmental pollution caused by solid waste, protect cultivated land resources, and realize the recycling of solid waste.

The mass parts of each raw material of the formula of the solid waste light-weight thermal insulation sintered brick according to the invention are as follows: 20-30 parts of urban sludge, 70-85 parts of river sludge, 2-4 pore-forming agents and 3-5 additives.

The urban sludge of the present invention comes from urban sewage treatment plants. The moisture content of the sludge is 80% after being filtered by flocculation combined with mechanical pressing, and the moisture content is less than 30% after natural drying; the sludge is mainly composed of minerals such as quartz and muscovite. and organic matter, among which the content of combustible organic matter is about 50%.

The river silt in the present invention is derived from dredging and dredging projects of inland rivers, and the water content of the river silt after natural drying is less than 20%. River silt is mainly composed of quartz, clay minerals (illite, montmorillonite), feldspar minerals (albite) and other minerals.

The pore-forming agent of the present invention is one or two kinds of straw powder and rice husk powder, and the straw powder and rice husk powder are powders with a diameter of less than 2mm after crushing of straw or rice husk.

The admixture described in the present invention is quicklime powder, the diameter of which is less than 1 mm after being ground by a ball mill.

River sludge, urban sludge, pore-forming agent and admixture are measured in proportion, stirred evenly by force, aged for 72 hours, made into adobe, and dried in the shade under natural conditions until the moisture content is less than 8%. Put it into a kiln for calcination, and control the calcination temperature at 1000-1100°C to make light-weight heat-retaining sintered bricks.

The beneficial effect of the invention is that: the light-weight thermal insulation fired brick prepared by using industrial solid waste as raw material has good thermal insulation performance and strength, and reduces production cost compared with ordinary clay fired bricks. The preparation process of the invention is simple, and the urban sludge, river sludge, pore-forming agent and admixture are mixed evenly according to the proportion, and then aged, formed, dried and sintered, and the weight, heat preservation performance and strength of the sintered brick can be made by adjusting The mixing amount of pore agent and admixture is realized. The new type of sintered brick not only solves the problem of urban sludge and river silt treatment, but also helps to protect cultivated land resources and the environment, realizes the recycling of solid waste, and meets the needs of building energy conservation.

detailed description

The present invention will be described in further detail and completely below in conjunction with the examples, but the present invention is not limited to the content in the following examples.

Example 1

The raw materials with the mass fraction of 77 parts of river sludge, 20 parts of urban sludge, 1 part of rice husk powder and 2 parts of quicklime powder were mixed evenly by force, aged for 72 hours, and made into bricks, and dried in the shade under natural conditions to the moisture content Less than 8%. Put it into the kiln for calcination, the calcination temperature is 1080℃, and make light-weight thermal insulation sintered bricks. The thermal conductivity of sintered bricks is 0.286W/m·K, and the compressive strength is 9.65MPa.

Example 2

The raw materials with the mass fraction of 76.5 parts of river sludge, 20 parts of urban sludge, 1.5 parts of rice husk powder and 2 parts of quicklime powder were forced to stir evenly, and aged for 72 hours to make bricks, which were dried in the shade under natural conditions to the moisture content. Less than 8%. Put it into the kiln for calcination, the calcination temperature is 1080℃, and make light-weight thermal insulation sintered bricks. The thermal conductivity of sintered bricks is 0.256W/m·K, and the compressive strength is 7.99MPa.

Example 3

The raw materials with the mass fraction of 76 parts of river sludge, 20 parts of urban sludge, 2 parts of rice husk powder and 2 parts of quicklime powder were mixed evenly by force, aged for 72 hours, made into adobe, and dried in the shade under natural conditions to the moisture content Less than 8%. Put it into the kiln for calcination, the calcination temperature is 1080℃, and make light-weight thermal insulation sintered bricks. The thermal conductivity of sintered bricks is 0.222W/m·K, and the compressive strength is 6.09MPa.

Example 4

The raw materials with the mass fraction of 71 parts of river sludge, 25 parts of municipal sludge, 2 parts of rice husk powder and 2 parts of quicklime powder were mixed evenly by force, aged for 72 hours, made into bricks, and dried in the shade under natural conditions to the moisture content Less than 8%. Put it into the kiln for calcination, the calcination temperature is 1080℃, and make light-weight thermal insulation sintered bricks. The thermal conductivity of sintered bricks is 0.192W/m·K, and the compressive strength is 5.43MPa.

Claims (1)

1. The mass parts of each raw material of light thermal insulation solid waste sintered bricks are: 20-30 urban sludge, 70-85 river sludge, 2-4 pore-forming agent and 3-5 admixture. The urban sludge has a water content of less than 30%, and is characterized in that the content of combustible organic matter is about 50%. The water content of the river channel silt is less than 20%. The pore-forming agent is one or two kinds of straw powder and rice husk powder, and the straw powder and rice husk powder are powders with a diameter of less than 2 mm after crushing straw or rice husk. The admixture is quicklime powder, the diameter of which is less than 1 mm after being ground by a ball mill. River sludge, urban sludge, pore-forming agent and admixture are measured in proportion, stirred evenly by force, aged for 72 hours, made into adobe, and dried in the shade under natural conditions until the moisture content is less than 8%. Put it into a kiln for calcination, and control the calcination temperature at 1000-1100°C to make light-weight heat-retaining sintered bricks.