This research is a study of the value of the mass concrete pressure getting lighter, using sewage sludge wastewater treatment plant the company's colors. U. r. Chemical in bangplee, samutprakarn zone came as gross material, educational, physical and chemical properties of sewage sludge by Microwave Digestion sample preparation method using sand-cement ratio. 1: 2: 4, respectively, and used water quantity starts at 50 percent of the weight of the weld material. When mixed according to the ratio then brought to curing humidity control under the age 7 and 14 days.
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