Performance Evaluation of Porous Hwang-toh Concrete Using Blast Furnace Slag Cement

Abstract

This study aims to evaluate a porous concrete using hwang-toh, blast furnace slag and blast furnace slag (BFS) cement instead of type I cement. The tests that were carried out to analysis the properties of porous hwang-toh BFS cement concrete included compressive strength, continuous void ratio, absorption rate, and pH value, repeated freezing and thawing test were conducted. Test results indicated that the performance in porous hwang-toh concrete are effective on the kaoline based binder materials. The pH value were shown in about 9.5 ~ 8.5. The compressive strength was increased and void ratio was decreased with increasing the kaoline based binder materials, respectively. The void ratio and compressive strength were in the range of about 21 ~ 30 %, 8 ~ 13 MPa, respectively. The increased in void ratio of more than 25 % is showed to reduce the resistance of repeated freezing and thawing. Also, the resistance of repeated freezing of thawing and the compressive strength of porous hwang-toh BFS cement concrete are independent with hwang-toh content and BFS cement amount. But, the void ratio was decreased with increasing the high volume hwang-toh contents (more than 15 %).

Carbon Dioxide Emission Evaluation of Porous Vegetation Concrete Blocks for Ecological Restoration Projects

“…Recently, as interest in ecosystem restoration has increased, many studies have been conducted on porous vegetation concrete, a concrete in which a certain amount of cement is replaced with industrial by-products, such as blast furnace slag fine powder, and which uses large rather than small aggregates to form concrete voids [1][2][3][4]. Such porous vegetation concrete has decreased mechanical performance and durability due to the larger voids [5][6][7][8][9].…”

Performance Evaluation and Field Application of Red Clay Green Roof Vegetation Blocks for Ecological Restoration Projects

“…It is desirable to construct an environment or space where nature and mankind coexist, namely, a green space [3][4][5]. However, it is very difficult to secure such spaces, so an alternative is to expand green spaces by utilizing roofs of buildings and houses as artificial grounds for use as green spaces [1,2].…”

Plant Growth and Water Purification of Porous Vegetation Concrete Formed of Blast Furnace Slag, Natural Jute Fiber and Styrene Butadiene Latex

“…Ecosystem restoration has received growing attention in recent years, and there have been many and diverse investigations of the properties of concretes, including porous vegetation concrete [1][2][3][4]. Plant growth is inhibited in concrete because of the limited space for rooting and sprouting, the low water permeability and retentivity, and the low nutrient content [5][6][7][8].…”