Introductory technical guidance for civil and structural engineers interested in alkali/silicate aggregate reactions in concrete. Here is what is discussed: 1. ALKALI-SILICA AGGREGATE REACTIONS 2. CRITERIA FOR RECOGNITION OF POTENTIALLY DELETERIOUS CONSTITUENTS IN AGGREGATE 3. METHODS OF DETERMINING THE POTENTIAL FOR REACTIVITY 4. RELIABILITY OF AVAILABLE TEST METHODS 5. CRITERIA FOR EVALUATING POTENTIAL REACTIVITY 6. CONTROL OF ALKALI-SILICA AGGREGATE REACTIONS.

Introductory technical guidance for civil engineers and other professional engineers and construction managers interested in alkali/silicate reactions in concrete aggregate. Here is what is discussed: 1. ALKALI-SILICA AGGREGATE REACTIONS, 2. CRITERIA FOR RECOGNITION OF POTENTIALLY DELETERIOUS CONSTITUENTS IN AGGREGATE, 3. METHODS OF DETERMINING THE POTENTIAL FOR REACTIVITY, 4. RELIABILITY OF AVAILABLE TEST METHODS, 5. CRITERIA FOR EVALUATING POTENTIAL REACTIVITY, 6. CONTROL OF ALKALI-SILICA AGGREGATE REACTIONS.

This book reviews the fundamental causes and spectrum effects of ASR. It considers he advances that have been made in our understanding of this problem throughout the world.

This book discusses the behaviour of isolated concrete bottle-shaped struts affected by internal expansion reactions (ISR). For that purpose, the numerical modelling of damaged concrete was performed using the Concrete Damaged Plasticity Model (CDPM) implemented in ABAQUS and validated the model through Sankovich's tests. A procedure to automatically obtain the concrete plasticity and damage parameters, essential for CDPM, was developed in Matlab. The inputs were the characteristic compressive strength of the concrete, the equivalent length of the finite element mesh and the ratio between the plastic and inelastic compressive strains. The results showed that the CDPM could represent the load-bearing mechanisms of isolated concrete bottle-shaped struts for a range of several stress levels to which these elements may be subjected in the panels investigated. The numerical simulations for different expansion levels consistently captured the expected damage profile of the panels and the load corresponding to the formation of the first crack, the estimated crack opening, and the ultimate load. For the panels investigated, the reduction observed in the failure load reached values close to 70%, the increase of the tensile plastic deformation was more than 60%, and the maximum crack opening can reach an increase of 113% when compared with those observed experimentally in panels without internal swelling reactions The book also offers a systematic review of the current state of knowledge and it is a valuable resource for scientists, students, practitioners, and lecturers in various scientific and engineering disciplines, namely, civil and materials engineering, as well as and other interested parties.

Volume 31 of Reviews in Mineralogy reviews current thinking on the fundamental processes that control chemical weathering of silicates, including the physical chemistry of reactions at mineral surfaces, the role of experimental design in isolating and quantifying these reactions, and the complex roles that water chemistry, hydrology, biology, and climate play in weathering of natural systems. The chapters in this volume are arranged to parallel this order of development from theoretical considerations to experimental studies to characterization of natural systems. Secondly, the book is meant to serve as a reference from which researchers can readily retrieve quantitative weathering rate data for specific minerals under detailed experimental controls or for natural weathering conditions. Toward this objective, the authors were encouraged to tabulate available weathering rate data for their specific topics. Finally this volume serves as a forum in which suggestions and speculations concerning the direction of future weathering research are discussed.

Silicate Science, Volume VI: Silicate Structures and Dispersoid Systems reviews the advances made in silicate research from 1960 through 1970, with emphasis on X-ray diffraction methods, their theory, and the refinements of special silicate structures, particularly of natural silicate minerals or of synthetic products. The Zolati systematics of silicate crystal structures are used in this treatise, along with the principle of a systematics after the "sharing coefficients." Comprised of three sections, this volume begins with an overview of the progress made in infrared and Raman spectroscopy as well as the Mössbauer nuclear paramagnetic resonance method. Advances in experimental techniques applicable to crystal structure problems and crystal chemistry are highlighted, together with research in isomorphism, isotypism, polymorphism, and the epitaxis phenomena. The next section deals with clay minerals and considers the refined physical-chemical methods used for their identification, chiefly by infrared spectroscopy. Structures, adsorption, and base exchange reactions of clay minerals with inorganic and organic compounds are analyzed. The final section is devoted to silica and silicate dispersoid systems and the many advances made in electron microscopy, especially in the Castaing electron microprobe method. This book will be of interest to mineralogists, chemists, and crystallographers.