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Excerpt from Proportioning Concrete Mixtures and Mixing and Placing Concrete Almost every one has more or less knowledge of the possible uses of concrete, yet a great many persons Who know of its numerous applications in building construction, fail to appreciate the fact that success in the use of concrete depends very largely upon the qualities of the sand and pebbles or broken stone of Which the concrete is largely composed. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
The design of concrete mixes is becoming increasingly complex, with the addition of new materials in the compounds, such as organic admixtures, fibres and supplementary cementitious materials. Moreover, the list of properties which concretes are required to possess for certain applications has increased, and interest is developing in rheology, dura
Excerpt from Method of Proportioning Concrete Materials, Screened and Unscreened Gravel The making of concrete is essentially a manufacturing process, but it suffers under the handicap of having no fixed plant location since the concrete must usually be made at the site of the structure. It is further more a chemical as well as a mechanical process, and is subject to various disturbing influences on that account. The factor that has had the most to do with the growth of the concrete industry and also with its slowness of scientific development has been the fact that anyone could take some cement, water, sand and stone, mix them together and get a. Substance that would set and harden. The job was so easy, it took a long time to establish the fact that most con crete so made was a very inferior article. That so much successful concrete work has been done in spite of poor methods is evidence of the value of the material. The basic requirements for the manufacture of concrete are today well established, and failure to make at least sound concrete is inexcusable. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
The design of concrete mixes is becoming increasingly complex, with the addition of new materials in the compounds, such as organic admixtures, fibres and supplementary cementitious materials. Moreover, the list of properties which concretes are required to possess for certain applications has increased, and interest is developing in rheology, durability, deformability and whole-life behaviour. This book presents a number of simple models for the understanding of a concrete system, and provides the techniques for developing more sophisticated models for the practical design of concrete mixes.
Practical Concrete Mix Design has been compiled to help readers understand the concrete mix design methodology, including formulas and tables involved in the pertinent steps. This book helps engineers understand the mix design procedure, through illuminating every possible explanation for each step of mix design, limitations given by standards, and practical guides on tailor-making concrete to meet specific requirements. The construction industry needs engineers/experts who can reduce the costs of concrete, and thereby increase their profitability. This book shows effective methods for optimizing concrete and simultaneously achieving the desired properties of concrete. It covers why, how, and when with respect to concrete proportioning and optimization. It further provides the necessary skills for engineers to hone their skills in doing so, understanding the risks involved, and troubleshooting related problems.
Based on and adapted from a combined workshop session and paper symposium presented at the 1972 ACI annual conventnion at Dallas, Texas, and sponsored by ACI Committee 211.