Abul Kalam Azad‚ and Mohammed Abdul Hameed A STUDY OF SELF-COMPACTING CONCRETE MADE WITH MARGINAL AGGREGATES Shamsad Ahmad∗‚ Abul Kalam Azad‚ and Mohammed Abdul Hameed Department of Civil Engineering King Fahd University of Petroleum & Minerals Dhahran‚ Saudi Arabia 1. INTRODUCTION Self-compacting concrete (SCC)‚ developed first in Japan in the late 1980s‚ represents one of the most significant advances in concrete technology in the last two decades. SCC was developed to ensure adequate compaction
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Aggregates for Concrete Aggregates are inert granular materials such as sand‚ gravel‚ or crushed stone that‚ along with water and cement‚ are an essential ingredient in concrete. Aggregates are the most mined materials in the world. For a good concrete mix‚ aggregates need to be clean‚ hard‚ strong particles free of absorbed chemicals or coatings of clay and other fine materials that could cause the deterioration of concrete. Aggregates‚ which account for 60 to 75 percent of the total volume
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Introduction Concrete mixtures can be designed to provide a wide range of mechanical and durability properties to meet the design requirements of a structure. The compressive strength of concrete is the most common performances measure used by engineer in designing buildings and other structures. The compressive strength is measured by breaking concrete specimen in a compression-testing machine. The compressive strength is calculated from the failure load divided by the cross-sectional area resisting
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placed between the two BS 5400 results‚ or close to the lower values. The Eurocode 2 results were usually reasonably close to the mean of the other results. The CEB-FIP-1990 results were consistently the lowest for high steel stresses and high concrete cover values. Results with varying spacing were close to Eurocode 2 results. The ACI 318 results were consistently the highest‚ being close to and
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PRECAST CONCRETE STRUCTURES VISVODAYA ENGINEERING COLLEGE DEPARTMENT OF CIVIL ENGINEERING KAVALI-524201 PAPER PRESENTATION BY Author 1: Author 2: D.chanikya ‚ Ch.Lokesh
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to communicate the importance and the significance that Roman Concrete and the Roman Arch played in history. Both architectural elements would greatly impact the whole of the Roman Empire. Concrete; Since 25 B.C.‚ when Vitruvius wrote about the distinct types of aggregate for use in structural mortar in his “Ten Books of Architecture‚” Roman “pozzolana” or concrete quickly became the binding agent in Roman life. The advent of concrete could not be overstated‚ it touched every life in the Roman Empire
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1. INTRODUCTION Concrete is a widely used building material‚ many concrete pavements such as bridge deck‚ highway pavements and airfield runways are constructed all over the world‚ due to its superior properties such as high strength‚ good stability‚ abrasion resistance and anti-slippage. However‚ concrete is a poor electrical conductor‚ especially under dry conditions. Concrete that is excellent in both mechanical and electrical conductivity properties may have important applications in the electrical
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SEMESTER 2 ( JUN 2013 ) CC203-CONCRETE TECHNOLOGY AHLI KUMPULAN NAMA TAJUK CONCRETE MATERIALS AND MIXTURE NAMA PENSYARAH KELAS CONTENT PAGES INTRODUCTION 1 BASIC PROPERTIES OF CONCRETE 2-5 BASIC KNOWLEDGE OF CEMENT 6-9 STORAGE METHODS OF CEMENT 10-12 FINE AGGREGATES AND COARSE AGGREGATES 13-14 PROPERTIES OF WATER USED IN CONCRETE MIXTURE 15-19 BASIC CONCEPT OF CONCRETE MIX 20 FRESH CONCRETE 21-23 ROLE OF ADDITIVES IN CONCRETE MIXTURE 24-25 CONCLUSION
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VSL FLOATING CONCRETE STRUCTURES EXAMPLES FROM PRACTICE SECOND PRINTING JULY 1992 VSL INTERNATIONAL LTD. Berne / switzerland Table of contents Page 1 Preface 1. Introduction 1 2. VSL Systems and Service Range 4 2.1. 2.1.1. 2.1.2. 2.1.3. 2.1.4. 2.1.5. 2.2. VSL Systems Introduction VSL Post-tensioning VSL Slipforming VSL Heavy Lifting Other VSL Systems Services offered by VSL 4 4 4 5 5 6 6 3. Examples from Practice 7 3.1. Introduction 7 3.2. 3.2.1. 3.2.2. 3.2.3. 3.2.4. 3.2.5.
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7166M01.qxd_lb 6/3/09 09:38 AM Page 1 1 BASIC CONCEPTS 1.1 INTRODUCTION Concrete is strong in compression‚ but weak in tension: its tensile strength varies from 8 to 14 percent of its compressive strength. Due to such a low tensile capacity‚ flexural cracks develop at early stages of loading. In order to reduce or prevent such cracks from developing‚ a concentric or eccentric force is imposed in the longitudinal direction of the structural element. This force prevents the cracks
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