The utilization of waste materials in concrete manufacture provides a satisfactory solution to some of the environmental concerns and problems associated with waste management. Agro wastes such as rice husk ash, wheat straw ash, hazel nutshell and sugarcane bagasse ash are used as pozzolanic materials for the development of blended cements. Few studies have been reported on the use of bagasse ash (BA) as partial cement replacement material in respect of cement mortars. In this study, the effects of BA content as partial replacement of cement on physical and mechanical properties of hardened concrete are reported. The properties of concrete investigated include compressive strength, splitting tensile strength, water absorption, permeability characteristics, chloride diffusion and resistance to chloride ion penetration. The test results indicate that BA is an effective mineral admixture, with 20% as optimal replacement ratio of cement.

Evaluation of bagasse ash as supplementary cementitious material

Rice husk ash as an alternate source for active silica production

Rice husk ash blended cement: Assessment of optimal level of replacement for strength and permeability properties of concrete

Stabilization of residual soil with rice husk ash and cement

This paper presents a study on the development of compressive strength up to 91 days of concretes with rice-husk ash (RHA), in which residual RHA from a rice paddy milling industry in Uruguay and RHA produced by controlled incineration from the USA were used for comparison. Two different replacement percentages of cement by RHA, 10% and 20%, and three different water/cementicious material ratios (0.50, 0.40 and 0.32), were used. The results are compared with those of the concrete without RHA, with splitting tensile strength and air permeability. It is concluded that residual RHA provides a positive effect on the compressive strength at early ages, but the long term behavior of the concretes with RHA produced by controlled incineration was more significant. Results of splitting tensile and air permeability reveal the significance of the filler and pozzolanic effect for the concretes with residual RHA and RHA produced by controlled incineration.

Strength development of concrete with rice-husk ash

Silica from rice husk through thermal decomposition

Reactivity of rice husk ash

Reaction product of lime and silica from rice husk ash

A classic set of polymeric interpenetrating polymeric network (IPN) micro-composites has been fabricated using an elastomer—styrene butadiene rubber [SBR], a thermoplastic poly(methyl methacrylate)-PMMA and with carbon black (CB)-N660 as a filler and reinforcing agent. This synthesized IPN composite can be promisingly employed as a toughened plastic and vibrational damper in a wide service range with excellent thermal stability, optimum storage modulus, and co-continuous morphological pattern. transmission electron microscopy, scanning electron microscopy, atomic force microscopy, and Raman imaging are successfully employed for the morphological characterization. Mechanical, thermal, viscoelastic, and damping features of IPN composites have been carefully studied in detail and compared with parent polymers, corresponding IPN, and composites. The double network formation of filler CB and plastic component PMMA form an intercalated morphological pattern in the SBR matrix with 20 times enhancement in toughness value compared with neat SBR. The fabrication and characterization adopted in this work can definitely act as a platform for the design of new toughened material with excellent performance and cost-effectiveness. 

Super tough interpenetrating polymeric network of styrene butadiene
 rubber‐poly
 (methyl methacrylate) incorporated with general purpose carbon black (
 N660
 )

Jose James

Papers

Silica from rice husk through thermal decomposition

Reactivity of rice husk ash

Reaction product of lime and silica from rice husk ash

Super tough interpenetrating polymeric network of styrene butadiene rubber‐poly (methyl methacrylate) incorporated with general purpose carbon black ( N660 )