Characteristics of Concrete Bricks After Partially Substituting PortlandCement Type 1 with Cement and Seashell Waste and Partially SubstitutingSand with Glass Waste

摘要

To manage solid waste from Si Chang Island, concrete bricks were produced by partially substi-tuting Portland cement Type 1 with green mussel/cockle seashell waste and cement waste andsand was partially substituted with glass waste. In producing bricks, water, cement, and sand weremixed at a weight ratio of 11.11:22.22:66.67. Using seashell waste (cockle seashells and greenmussels) in concrete bricks as partial replacement of cement and cement waste, the results showedthat the addition of seashell waste content decreased the compressive strength and increased thewater absorption of the bricks. The optimal mixture of cement, cement waste, and seashell wastewas at a weight ratio of 19:2.11:1.11 in which the compressive strength and water absorptionof the bricks produced from cockle seashell waste were 6.41 MPa and 7.44%, respectively, andthose from green mussel waste were 6.30 MPa and 7.91%. In addition, by replacing sand withglass waste, the results revealed that compressive strength and water absorption were decreasedwhen glass waste was increased. In conclusion, concrete bricks produced by partially substitutingPortland cement Type 1 with cement waste and seashell waste and partially substituting sandwith glass waste are compliant with TIS 57-2533 with an optimal ratio of 19: 2.11: 1.11: 56.67: 10:11.11 (Portland cement Type1: cement waste: seashell waste: sand: glass waste: water) by weight.