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
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Example Embodiment
[0025] Example one:
[0026] Step 1. Fabricate the steel frame and arrange it in the inspection manhole cover mold;
[0027] Step 2: According to the proportion 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, mix evenly to prepare a concrete mixture;
[0028] Step 3: Inject the concrete mixture into the mold to form;
[0029] Step 4. Curing for 3 days at room temperature (25°C);
[0030] Step 5, autoclave at a constant temperature for 6 hours in an autoclave with a saturated vapor pressure of 1.2MPa, and then exit the autoclave;
[0031] Step 6, impregnate methyl methacrylate on the concrete base of the inspection manhole cover.
Example Embodiment
[0032] Embodiment two:
[0033] Step 1. Fabricate the steel frame and arrange it in the inspection manhole cover mold;
[0034] Step 2. According to the ratio of PI cement 240.0kg, sand 624.0kg, stone 1152.0kg, polycarboxylic acid water reducing agent 3.1kg, ground quartz sand 72.0kg, wollastonite 24.0kg, and water 73.5kg, mix it evenly and prepare it. Concrete mixture
[0035] Step 3: Inject the concrete mixture into the mold to form;
[0036] Step 4. Curing for 6 hours under steam curing (80°C);
[0037] Step 5, autoclave at a constant temperature for 6 hours in an autoclave with a saturated vapor pressure of 1.2MPa, and then exit the autoclave.
[0038] Step 6, impregnating methyl methacrylate on the concrete matrix of the autoclaved inspection manhole cover.
Example Embodiment
[0039] Embodiment three:
[0040] Step 1. Make a steel bar skeleton and arrange it in the water grate cover mold;
[0041] Step 2. According to the ratio of PI cement 240.0kg, sand 624.0kg, stone 1152.0kg, polycarboxylic acid water reducing agent 3.1kg, ground quartz sand 72.0kg, wollastonite 24.0kg, and water 73.5kg, mix it evenly and prepare it. Concrete mixture
[0042] Step 3. Inject the already mixed concrete mixture into the mold to form;
[0043] Step 4. Curing for 6 hours under steam curing (75°C);
[0044] Step 5, autoclave at a constant temperature for 4 hours in an autoclave with a saturated vapor pressure of 1.0 MPa, and then exit the autoclave.
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