To study effects of several factors on the properties of fly ash based geopolymer concrete on the compressive strength and also the cost comparison with the normal concrete. The test variables were molarities of sodium hydroxide(NaOH) 8M,14M and 16M, ratio of NaOH to sodium silicate (Na2SiO3) 1, 1.5, 2 and 2.5, alkaline liquid to fly ash ratio 0.35 and 0.40 and replacement of water in Na2SiO3 s...

China has one of the largest coal mining industries in the world. Electricity in this country is mostly generated by coal-fired electric power plants. These plants produce huge amounts of ash each year. In 1988, Shanghai city alone produced nearly 1.8 million tons of ash. During the last two decades, a substantial amount of research work conducted by the Shanghai Research Institute of Building ...

Formulations of Metarhizium anisopliae conidia with oven ash, chalk powder, charcoal and wheat flour at a ratio of 1:4 (W/W) were prepared. Formulations containing charcoal and oven ash had a conidial viability half-life of 4.1–4.3 months at 2071!C. In comparison, unformulated conidia held under the same conditions had a viability half-life of 0.9 month. Bioassays carried out at 2872!C and 7075...

A research program was carried out to evaluate the chloride ion permeability of both air and non-air entrained concretes made with mineral admixtures as partial replacements of cement. Two series of investigations (Series 1 and Series 2) were carried out. The mixtures were proportioned to have 28-day strengths of 35 MPa for Series 1 and 69 MPa for Series 2. Chloride ion permeability was determi...

： About 500 million tons (Mt) fly ash produces from coal-fired power stations every year in China, which causes severe economic and environmental problems. In this paper, current status and prospect of fly ash utilization in China was introduced in detail. China is a huge country which has many different geographical environments and various level of economic development. So, the level and meth...

Lightweight aggregate (LWA) production with sewage sludge and municipal solid waste incineration (MSWI) fly ash is an effective approach for waste disposal. This study investigated the stability of heavy metals in LWA made from sewage sludge and MSWI fly ash. Leaching tests were conducted to find out the effects of MSWI fly ash/sewage sludge (MSWI FA/SS) ratio, sintering temperature and sinteri...

Abstract Objective In patients with traumatic acute subdural hematoma (ASH), it has not been yet fully elucidated which can benefit from surgery or clinical follow-up. This study was constructed to predict treatment modality and short-term prognosis in ASH using their clinical, radiological, biochemical laboratory findings during admission hospital. Methods Findings of determined on CT scan bet...

Ash application influences availabilities of plant micronutrients either directly through addition of its miEnergy generation from biomass is an environmentally sound altercronutrients constituents or indirectly through the modinative to other energy producing technologies. Pilot studies have indicated that alfalfa (Medicago sativa L.) is a suitable feedstock for fication of soil pH. Increased ...

The study involved 286 patients (17-58 years, 55.9% females and 44.1% males). SPT was performed with extracts “Mixture of trees” (Diater Laboratorios, Spain). The study of allergen components was made by ImmunoCAP. We evaluated the efficiency of SLIT by visual analogue scale. 98.3% patients had positive SPT to extract “Mixture of trees”. N=281:191 (68.1%) individuals were positive to birch extr...