Unlock instant, AI-driven research and patent intelligence for your innovation.

Unburned ceramsite for sludge waste concrete mortar and preparation method thereof

A technology for waste concrete and mortar, applied in the field of building materials and waste recycling, can solve the problems of difficult and effective utilization, high cost, and difficult burning quality of clinker, so as to reduce the occupation of land resources, utilize high-value resources, Good density effect

Active Publication Date: 2022-01-11
YANGZHOU POLYTECHNIC COLLEGE
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Waste concrete mortar accounts for about 40% of the total waste concrete, and has a large storage capacity, but it is difficult to be effectively utilized due to its low strength, porous and easy to absorb water
Although some studies have proposed to use waste concrete mortar powder as a cementitious material after heat treatment at a certain temperature, the process is difficult and the cost is high; some people also try to use waste concrete mortar powder as cement clinker raw material after fine grinding, But it will cause the clinker to be difficult to grind and burn and the quality is low
At present, there are few reports on effective utilization methods of waste concrete mortar with high efficiency, low cost and low energy consumption

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing unfired ceramsite for sludge waste concrete mortar, the steps are as follows:

[0026] Pass the urban dredging sludge through a sieve of about 15mm to remove larger solid impurities, and the water content of the sludge is determined to be 86%;

[0027] Put the waste concrete mortar into the pulverizer for grinding, and the fineness of the mill is 10% (0.08mm square hole sieve allowance), to obtain the waste concrete mortar powder; cement, mineral powder, fly ash, gypsum, sodium sulfate according to Mix evenly in the ratio of 54:20:20:5:1 to obtain a curing agent; measure and sieve 20 parts of urban dredging sludge, 62 parts of waste concrete mortar powder, 15 parts of curing agent, and 2.5 parts of ethylene-vinyl acetate emulsion , 0.5 parts of carboxymethyl cellulose are sent to the wheel mill, and the wheel is milled for 5 minutes; the evenly stirred mixture is put into the roller granulator, and processed into round granules with a diameter of ...

Embodiment 2

[0030] A method for preparing unfired ceramsite for sludge waste concrete mortar, the steps are as follows:

[0031] Pass the urban dredging sludge through a sieve of about 15mm to remove larger solid impurities, and measure the water content of the sludge to be 72%;

[0032] Put the waste concrete mortar into the pulverizer for grinding, and the grinding fineness is 13% (0.08mm square hole sieve allowance), to obtain waste concrete mortar powder; cement, mineral powder, fly ash, gypsum, sodium sulfate according to Mix evenly in the ratio of 79:10:10:0.5:0.5 to obtain a curing agent; measure and sieve 40 parts of urban dredging sludge, 38 parts of waste concrete mortar powder, 20 parts of curing agent, and 1.2 parts of ethylene-vinyl acetate emulsion , 0.8 parts of carboxymethyl cellulose are sent to the wheel mill, and the wheel is milled for 3 minutes; the evenly stirred mixture is put into the roller granulator, and processed into round granules with a diameter of 10-20mm; ...

Embodiment 3

[0035] A method for preparing unfired ceramsite for sludge waste concrete mortar, the steps are as follows:

[0036] Pass the urban dredging sludge through a sieve of about 15mm to remove larger solid impurities, and measure the water content of the sludge to be 79%;

[0037] Put the waste concrete mortar into the pulverizer for grinding, and the fineness of the mill is 15% (0.08mm square hole sieve allowance), to obtain the waste concrete mortar powder; cement, mineral powder, fly ash, gypsum, sodium sulfate according to Mix evenly in the ratio of 59:30:5:5:1 to obtain a curing agent; measure and sieve 30 parts of urban dredging sludge, 42 parts of waste concrete mortar powder, 25 parts of curing agent, and 2.0 parts of ethylene-vinyl acetate emulsion 1.0 parts of carboxymethyl cellulose are sent to the wheel mill, and the wheel is milled for 4 minutes; the evenly stirred mixture is put into the roller granulator, and processed into round granules with a diameter of 10~20mm; ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
cylinder compressive strengthaaaaaaaaaa
cylinder compressive strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a non-fired ceramsite for sludge waste concrete mortar in the field of building materials. ~25 parts, 1.0~3.0 parts of ethylene-vinyl acetate emulsion, 0.5~1.0 parts of carboxymethyl cellulose; the curing agent contains 47~79 parts of cement, 10~30 parts of mineral powder, 5 parts of fly ash by mass parts ~20 parts, 0.5~5 parts of gypsum, 0.5~1 part of sodium sulfate, the present invention directly utilizes the raw sludge of urban dredging sludge without dehydration and thermal incineration treatment, and realizes low energy consumption and high value resource utilization of urban dredging sludge, which can be used in urban planning and construction.

Description

technical field [0001] The invention relates to ceramsite, in particular to a preparation method of ceramsite, belonging to the field of building materials and waste resources. Background technique [0002] In order to maintain normal functions such as urban water landscape and navigation, urban water bodies need to be dredged regularly, and a large amount of water body sediments produced during the dredging process are called urban dredging sludge. Currently commonly used landfill or stacking disposal methods not only easily cause secondary pollution, but also have high transportation costs and occupy a large amount of land resources. Now many researchers use urban dredging sludge as resources after dehydration or thermal incineration, which often consumes a lot of energy and costs. In addition, waste concrete is sorted from construction waste, and waste concrete recycled aggregate and waste concrete mortar are obtained through crushing, screening and other processes. In ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B28/08C04B28/02
CPCC04B28/04C04B28/08C04B28/021C04B2201/50C04B18/141C04B18/08C04B22/143C04B22/147C04B18/0436C04B18/16C04B24/2623C04B24/383
Inventor 吴书安
Owner YANGZHOU POLYTECHNIC COLLEGE