Bøger af Salmabanu Luhar

During 1978, French scientist Joseph Davidovits has invented "Geopolymer" by the process of Geopolymerisation-a green chemistry. Recent and forthcoming researches in geopolymer technology will revolutionize construction industry and will coerce a novel era of green construction materials through replacement of OPC by GPC. The geopolymer concrete has been accepted as a more durable ¿green¿ concrete with less energy consumption and nine time less emission of Carbon Dioxide compared to OPC concrete, which in turn, results in mitigation to global warming- a fiery dilemma. This book is an attempt to understand Fly ash and slag based Geopolymer concrete in detail which include an extensive experimental studies on effect of various parameters viz. ratio of Sodium Silicate to Sodium Hydroxide solution, addition of water, rest period, curing temperatures, curing time, different curing methods, addition of super plasticisers on Fly ash and slag based geopolymer concrete. The final part of this book describes the effect of addition of Fly ash and Slag on mechanical properties of geopolymer concrete like compressive strength, Split-tensile strength, Flexural strength and Modulus of Elasticity.

On one hand, a mushrooming boost in the world population, urbanizations and gargantuan housings plus infrastructural developments have altogether twisted the arm of researchers, scientists, and engineers to invent alternative innovative, affordable, eco-benevolent, and essentially sustainable building materials. On the other hand, piles of modern wastes generated by discarded electronic and electrical equipments found to impact pessimistically on environment; surface and sub-surface water; soils; besides leaching of highly toxic elements escorting to human health hazards. Incorporation of these profuse recycled E-wastes with concrete not only turns it to ¿Green concrete¿ but also offers a systematic solution to manage its landfills through its consumption for good cause of presenting green construction material sans compromising its sustainability, strength and durability. It is a concept to ¿Go Green, Live Green¿, i.e., mitigation of emission of primary green house gas CO2 to provide a relief for gigantic dilemma of global warming; conservation of energy and natural restricted resources; reduction of pollution of air, water, soils; and of course, with a cost-effective approach!

A revolution of concrete technology right from Roman concrete ¿ Opus caementicium to modern traditional concrete is eye-witnessed by humanity and today it can be considered as a backbone of development. Concrete is the basis for most buildings and structural projects since the ancient Romans era by virtue of its sustainability, strength, and prolonged durability. It is one of the oldest and most extensively used construction materials on the sphere as it exhibits lots of optimistic attributes. No building material on the earth is as versatile as it is! That is exactly why its gigantic exigency exists across the planet. Consequently, its global production jumps 10 billion tons annually.This book describes, briefly, not merely conventional but also some special types of modern concrete in context to its constituent aggregates, mix design, terminology, applications, cement with its chemistries, pozzolanic mineral admixtures and construction chemicals, etc. Also, the challenges standing in the pathway of concrete and its binder have been portrayed. Concrete has proved itself as key edifice material symbolizing the progress of construction and infrastructure industries for urbanization.