Development of Sustainable Mortar from Waste Paper Pulp Ash

Abstract

In developing countries, disposal of waste generated from industries and agriculture sector is a major concern. Use of such industrial/agricultural waste in construction can be the viable solution not only for environmental pollution but also for land disposal problems. In view of developing sustainable mortar, waste paper pulp ash is used as a partial replacement of cement in various range from 5% to 20% with increment of 5%. The physico-chemical properties of the obtained waste paper pulp ash were studied, and it was observed that the silica content was about 29.25% which is near to silica content in cement. Two mortar mixes 1:4 and 1:6 proportion were designed. Mortar cubes were prepared for different mixes and were cured for various curing periods. The developed mortar mixes were tested for the various physico-mechanical tests viz. compressive strength, flexural brick bond strength, shear brick bond strength and shrinkage limit test. The test results revealed that as the content of the waste increased, the water to cement ratio for the mix was also significantly increased, since the wastepaper pulp has a high degree of water absorption. At the optimum dose of 10% replacement of waste paper pulp ash, the compressive, flexural brick bond and shear brick bond strength was increased by 10% as compared to control mix. Therefore, development of sustainable mortar using waste paper pulp ash will be helpful to survive environment from industrial pollution.

Keywords: Paper Pulp Ash; Mortar; Compressive Strength; Shear Brick Bond Strength; Flexural Strength Brick Bond