Effects Of Steam Curing On High Strength Concrete With Fly Ash Replacement
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High-performance, High-volume Fly Ash Concrete
| Author | : V. Mohan Malhotra |
| Publisher | : |
| Total Pages | : 120 |
| Release | : 2005 |
| Genre | : Fly ash |
| ISBN | : 9780973150728 |
The Influence of Fly Ash and Early-age Curing Temperature on the Durability and Strength of High Performance Concrete
| Author | : Christopher Michael Evans |
| Publisher | : |
| Total Pages | : 0 |
| Release | : 1997 |
| Genre | : |
| ISBN | : |
Early-stage curing temperature has a significant effect on high performance concrete durability and strength. Concrete cures at high temperatures when poured in large volumes due to the autogeneous heat generated by the hydration reactions of cementitious materials. The addition of supplementary cementing materials to concrete reduces the heat of hydration and extends the service life in structures by improving both long term durability and strength. This thesis investigates the effects of early-age curing temperature on the durability and strength of silica fume and fly ash modified concretes. Accelerated test methods were used to measure chloride diffusion in concretes produced with silica fume cement (T10SF) and various levels and types of fly ash replacement. The concrete mix determined to be the most durable with respect to chloride diffusion had 56% of the Type 10SF cement replaced with a moderate-level calcium content fly ash. The use of the Rapid Chloride Permeability Test, (ASTM C 1202, AASHTO T 277) has been widely criticised. Despite a limited data set, good correlation was shown in the results of this research between a two-chamber accelerated chloride migration cell test, and the RCPT.
Pore Structure of Cement-Based Materials
| Author | : Kalliopi K. Aligizaki |
| Publisher | : CRC Press |
| Total Pages | : 442 |
| Release | : 2005-09-22 |
| Genre | : Science |
| ISBN | : 9780419228004 |
Pore Structure of Cement-Based Materials provides a thorough treatment of the experimental techniques used to characterize the pore structure of materials. The text presents the principles and practical applications of the techniques used, organized in an easy-to-follow and uncomplicated manner, providing the theoretical background, the way to analyze experimental data, and the factors affecting the results. The book is the single comprehensive source of the techniques most commonly used for pore structure analysis, covering simple techniques like mercury intrusion porosimetry and water absorption, to the more sophisticated small-angle scattering and nuclear magnetic resonance. The book is an essential reference text for researchers, users, and students in materials science, applied physics, and civil engineering, who seek a deep understanding of the principles and limitations of the techniques used for pore structure analysis of cement-based materials.
Developments in the Formulation and Reinforcement of Concrete
| Author | : Sidney Mindess |
| Publisher | : Woodhead Publishing |
| Total Pages | : 442 |
| Release | : 2019-06-26 |
| Genre | : Architecture |
| ISBN | : 0128189282 |
Developments in the Formulation and Reinforcement of Concrete, Second Edition, presents the latest developments on topics covered in the first edition. In addition, it includes new chapters on supplementary cementitious materials, mass concrete, the sustainably of concrete, service life prediction, limestone cements, the corrosion of steel in concrete, alkali-aggregate reactions, and concrete as a multiscale material. The book's chapters introduce the reader to some of the most important issues facing today's concrete industry. With its distinguished editor and international team of contributors, users will find this to be a must-have reference for civil and structural engineers. Summarizes a wealth of recent research on structural concrete, including material microstructure, concrete types, and variation and construction techniques Emphasizes concrete mixture design and applications in civil and structural engineering Reviews modern concrete materials and novel construction systems, such as the precast industry and structures requiring high-performance concrete
Supplementary Cementing Materials
| Author | : Rafat Siddique |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 297 |
| Release | : 2011-03-28 |
| Genre | : Technology & Engineering |
| ISBN | : 3642178669 |
This book is an attempt to consolidate the published research related to the use of Supplementary Cementing Materials in cement and concrete. It comprises of five chapters. Each chapter is devoted to a particular supplementing cementing material. It is based on the literature/research findings published in journals/conference proceeding, etc. Topics covered in the book are; coal fly ash, silica fume (SF), granulated blast furnace slag (GGBS), metakaolin (MK), and rice husk ash (RHA). Each chapter contains introduction, properties of the waste material/by-product, its potential usage, and its effect on the properties of fresh and hardened concrete and other cement based materials.
Study of Steam and Microwave Curing of Concretes Containing Slag, Fly Ash, Or Silica Fume
| Author | : Ming-Gin Lee |
| Publisher | : |
| Total Pages | : 7 |
| Release | : 2014 |
| Genre | : Compressive strength |
| ISBN | : |
This study investigates the effects of steam and microwave curing on concretes containing fly ash, blast-furnace slag, or silica fume. Two steam curing treatments, four microwave curing times, and four types of concrete mix were used in this study. The test results indicated that microwave heating could further increase the compressive strength of mortar and concrete. Pozzolanic reaction of silica fume, fly ash, and blast-furnace slag was observed to be further promoted by steam-microwave curing. Mortar and concrete samples with 10 % silica fume added responded well to microwave curing. The strength gain development of mortar and concrete appeared to level off after 40 min of microwave curing. Thus, a 40-min microwave heating time appeared to be the optimal time for energy saving consideration. The microwave-cured concrete did not show an increase in permeability relative to the concrete that was steam-cured, but showed an increase in strength. Thus, the microwave techniques could provide the advantage of quick and uniform heating for curing of cement mortar and concrete.
Recycled Aggregate in Concrete
| Author | : Jorge de Brito |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 453 |
| Release | : 2012-11-28 |
| Genre | : Technology & Engineering |
| ISBN | : 1447145402 |
Concrete is the most used man-made material in the world since its invention. The widespread use of this material has led to continuous developments such as ultra-high strength concrete and self-compacting concrete. Recycled Aggregate in Concrete: Use of Industrial, Construction and Demolition Waste focuses on the recent development which the use of various types of recycled waste materials as aggregate in the production of various types of concrete. By drawing together information and data from various fields and sources, Recycled Aggregate in Concrete: Use of Industrial, Construction and Demolition Waste provides full coverage of this subject. Divided into two parts, a compilation of varied literature data related to the use of various types of industrial waste as aggregates in concrete is followed by a discussion of the use of construction and demolition waste as aggregate in concrete. The properties of the aggregates and their effect on various concrete properties are presented, and the quantitative procedure to estimate the properties of concrete containing construction and demolition waste as aggregates is explained. Current codes and practices developed in various countries to use construction and demolition waste as aggregates in concrete and issues related to the sustainability of cement and concrete production are also discussed. The comprehensive information presented in Recycled Aggregate in Concrete: Use of Industrial, Construction and Demolition Waste will be helpful to graduate students, researchers and concrete technologists. The collected data will also be an essential reference for practicing engineers who face problems concerning the use of these materials in concrete production.
Use of Fly Ash in Heat-cured Concrete and the Effect of Post-curing Storage Regimes on Strength, Modulus of Elasticity, and Freezing-thawing Durability
| Author | : PM. Gifford |
| Publisher | : |
| Total Pages | : 10 |
| Release | : 1993 |
| Genre | : Accelerated curing |
| ISBN | : |
This study examines the use of ASTM Type C fly ash from two western Canadian sources with a Type III cement and aslump-extending superplasticizer. The heat-cured concrete had a low water-to-cementitious ratio. The fly ash was used to replace cement at 10 and 20% by weight. Effects on strength development, modulus of elasticity, and durability of subsequent storage regimes are presented.
