Abstract: Porous concrete for low-impact development has long been studied the improvement of urban stormwater management. However, porous made using Recycled Concrete Aggregate (RCA) is still lacking, particularly concerning its strength and infiltration rates. Therefore, this paper aimed to design RCA with optimum rate without compromising strength. To fulfill aim, a laboratory study evaluati...

Biochemical methods were selected to evaluate the role of exopolymeric substances in the stability of biofilms used in bioremediation processes. Biofilms of Thiomonas arsenivorans formed on pozzolana were thus treated with pronase (protein target), lectins (Con A or PNA), calcofluor or periodic acid (polysaccharides target), DNase (DNA target), and lipase (triglycerides target). Neither proteas...

In the exploratory study presented in this paper, an attempt was made to develop different mixtures of ultrahigh performance concrete (UHPC) using various locally available natural and industrial waste materials as partial replacements of silica fume and sand. Materials such as natural pozzolana (NP), fly ash (FA), limestone powder (LSP), cement kiln dust (CKD), and pulverized steel slag (PSS),...

In view of the ever depletion sources construction materials, there is a need to explore feasibility using palm kernel shells and glass as replacements for natural crushed aggregates in Portland cement concrete. Concrete specimens produced with 25% partial replacement coarse aggregate varying percentages recycled powder pozzolana were tested their workability, compressive strength, tensile stre...

The purpose for taking up this investigation owing to the fact that now a days natural sand confirming to Indian Standards is becoming scarcer and costlier due to its non availability in time because of Law of Land, illegal dredging by sand mafia, accessibility to the river source during rainy season, non confirming with IS 383-1970. Hence the present investigation was taken up with a view to v...

the purpose of this work was to test the efficiency of the treatment of wastewater by infiltrationunder laboratory conditions, to remove bacterial and organic load and to convert it to available nutrient for crop plants. in order to achieve this objective, polyvinyl chloride (pvc) columns of 133 cm of height were used. the columns were filled with sand and/or pozzolana and loaded with municipal...