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Method for manufacturing manhole cover or water grate cover

A technology for inspecting wells and water grates, which is applied in the field of manufacturing inspection well covers or water grate covers with autoclaved technology, and the field of unfixed cover plates with drain holes, which can solve the problems of easy cracking, anti-theft, and easy breakage. and other issues, to achieve the effect of light weight, obvious economic and social benefits, and high carrying capacity

Inactive Publication Date: 2010-09-01
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cast iron manhole covers have the advantages of high strength, good rigidity, and impact resistance, but the problem of anti-theft has not been effectively solved
However, manhole covers and water grate covers made of steel fiber reinforced concrete generally have the problem of being easy to crack and break.

Method used

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  • Method for manufacturing manhole cover or water grate cover

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Step 1, make the steel skeleton and arrange it in the manhole cover mold;

[0027] Step 2, mix evenly according to the ratio of P.I cement 238.0kg, sand 595.0kg, stone 1071.0kg, FDN3.0kg, ground quartz sand powder 71.4kg, water 80.0kg, lime 23.8kg, and prepare a concrete mixture;

[0028] Step 3, injecting the concrete mixture into the mould;

[0029] Step 4, curing at room temperature (25°C) for 3 days;

[0030] Step 5, autoclave at constant temperature for 6 hours in an autoclave with a saturated vapor pressure of 1.2MPa, and leave the autoclave;

[0031] Step 6, impregnating methyl methacrylate on the concrete substrate of the manhole cover.

Embodiment 2

[0033] Step 1, make the steel skeleton and arrange it in the manhole cover mold;

[0034] Step 2, according to the ratio of P.I cement 240.0kg, sand 624.0kg, stone 1152.0kg, polycarboxylate water reducer 3.1kg, ground quartz sand 72.0kg, wollastonite 24.0kg, water 73.5kg, mix evenly, and prepare concrete mix;

[0035] Step 3, injecting the concrete mixture into the mould;

[0036] Step 4, curing under steam curing (80°C) for 6 hours;

[0037] Step 5, autoclave at a constant temperature for 6 hours in an autoclave with a saturated vapor pressure of 1.2 MPa, and exit the autoclave.

[0038] Step 6, impregnating methyl methacrylate on the concrete substrate of the autoclaved manhole cover.

Embodiment 3

[0040] Step 1, making the reinforcement skeleton and placing it in the water grate cover mould;

[0041] Step 2, according to the ratio of P.I cement 240.0kg, sand 624.0kg, stone 1152.0kg, polycarboxylate water reducer 3.1kg, ground quartz sand 72.0kg, wollastonite 24.0kg, water 73.5kg, mix evenly, and prepare concrete mix;

[0042] Step 3, injecting the mixed concrete mixture into the mould;

[0043] Step 4, curing under steam curing (75°C) for 6 hours;

[0044] Step 5, autoclave at a constant temperature for 4 hours in an autoclave with a saturated vapor pressure of 1.0 MPa, and exit the autoclave.

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PUM

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Abstract

The invention discloses a method for manufacturing a cement concrete manhole cover or a water grate cover by using an autoclaving process, belongs to the technical field of building materials and relates to the method, which comprises the following steps of: taking cement, sand, stones, additives, admixtures, steel fibers, water, lime and grammite as main raw materials, wherein the admixtures are one or more of slag powder, fly ash, quartz sand powder, steel slag and other levigated silicon-containing industrial solid wastes or tailings powder; uniformly mixing the cement, sand, stones, additives, admixtures, steel fibers, water, lime and grammite in certain proportion; placing a reinforcement cage into a mould of the manhole cover or the water grate cover; pouring the concrete mixture into the mould for molding, maintaining the mould at the normal temperature or under the condition of steam for 0.5 hour to 28 days; and autoclaving the mould at the constant temperature under an autoclaving condition (steam pressure is 0.5 to 1.5 MPa) for 0.5 to 16 hours to manufacture the manhole cover or the water grate cover. The autoclaved manhole cover or water grate cover produced by the method has the characteristics of high strength, little deformation and high durability; and the method has the advantages of making good use of solid wastes and achieving remarkable economic effect and social effect.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to an inspection well cover used for inspecting underground pipelines and covering the ground, and an unfixed cover plate with a drain hole (hereinafter referred to as a water grate cover) placed on a cover seat of a rainwater outlet or an open ditch. ), also relates to the method for manufacturing inspection well cover or water grate cover with autoclave process. Background technique [0002] With the development of society and the progress of civilization, the scale of urban construction is getting larger and larger, and the facilities for urban construction are becoming more and more perfect. Used for water supply, drainage pipelines, natural gas, city gas pipelines, electric power, cable pipelines, communications, fire pipelines and other urban pipeline networks that need inspection wells, motor vehicles and non-motor vehicles such as highways, urban roads, factories an...

Claims

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Application Information

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IPC IPC(8): E02D29/14E03F5/02B28B13/02B28B11/24
Inventor 柯昌君江盼王浩吴维舟袁兵柯涛
Owner YANGTZE UNIVERSITY
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