This research aims to study the usage pumice rock fragments to develop paving block product for community. The mixture ratios of Portland cement type1: sand: quarry dust: pumice rock fragments: water that there are 6 ratios. The paving block samples are casted in 30 x 30 x 5 centimeter in dimension. The paving block sample testing follows the TIS 378-2531 on concrete flooring tiles. From the experiment bending strength and thermal conductivity of paving blocks with high quantity of pumice rock fragments are lower than paving blocks with low quantity of pumice rock fragments but the water absorption of paving blocks with high quantity of pumice rock fragments are higher. However all of pumice rock fragments paving block samples with lower than 1: 2: 2.4: 0.6: 0.6 of ratio can pass the standard and the surface temperature is lower than other covering materials about 2 degree Celsius.

In this study autoclaved aerated concrete (ACC) were investigated as low-cost andsimple adsorbents for removal of Pb(II) from aqueous solution. The adsorption of Pb(II) wascarried out by batch experiments as a function of solution pH adsorbent dosage contacttime initial Pb(II) concentration and temperature. The experimental data were analyzed bythe Langmuir Freundlich Temkin and D-R isotherm models. The Langmuir isotherm modelis more suitable. The monolayer adsorption capacity of ACC was found to be 3.99 mg g−1.The adsorption of Pb(II) onto ACC was physical in nature. The kinetic studies of Pb(II)demonstrated that the adsorption of Pb(II) onto ACC adsorbents followed a pseudosecond-order model with a good correlation.