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E-raamat: Issues and Discussion of Modern Concrete Science

  • Formaat: PDF+DRM
  • Sari: Engineering
  • Ilmumisaeg: 19-May-2015
  • Kirjastus: Springer-Verlag Berlin and Heidelberg GmbH & Co. K
  • Keel: eng
  • ISBN-13: 9783662472477
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Issues and Discussion of Modern Concrete ScienceSuurem pilt
  • Formaat: PDF+DRM
  • Sari: Engineering
  • Ilmumisaeg: 19-May-2015
  • Kirjastus: Springer-Verlag Berlin and Heidelberg GmbH & Co. K
  • Keel: eng
  • ISBN-13: 9783662472477
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This book is devoted to two primary objectives. The first is to present the errors, inadaptability and mistakes arising when the current theory on concrete is applied to explaining practical construction of concrete; the second is to put forward viewpoints in modern concrete science.

Taking a number of engineering cases as examples, we experimentally studied and theoretically analyzed the errors, inadaptability, and mistakes when the current theory on concrete is applied to explaining practical construction of concrete. Moreover, we investigated the use of mixing ratios, aggregates, cement, high-performance concrete and fibers, as well as the frost resistance, cracking behavior, durability, dry shrinkage and autogenous healing to address and remedy the shortcomings in today’s concrete science, put forward new proposals and make a number of innovative achievements in the field, particularly in modern theory on concrete science. The results and topics which will be of particular interest to engineers and researchers include: corrections to several one-sided, even mistaken views on concrete construction in the field and a new theory that can be adopted to improve the durability of concrete projects, to control and improve the implementation quality of concrete projects and to guide teaching in universities.
Wenke Yang is a distinguished senior engineer at China Airport Construction Group Corporation, General Administration of Civil Aviation of China (CAAC).

1 Sole of Concrete---Mix Proportion
1(24)
1.1 Theoretical Foundation for Past Mix Proportion
2(5)
1.1.1 Specific Surface Area Method
2(2)
1.1.2 Maximum Density Method
4(1)
1.1.3 Weymouth Grap Grading Method
5(2)
1.2 Inadaptability Between Old Mix Proportion and Modern Concrete
7(4)
1.3 Reasons and Puzzles
11(2)
1.4 Thinking About Establishing the Modern Concrete Mix Proportion Theory
13(6)
A.1 Others
19(6)
A.1.1 Different Opinions
19(4)
References
23(2)
2 Important Raw Material---Coarse Aggregate
25(10)
2.1 Aggregate Varieties and Causes Overview
25(5)
2.2 Effects of Different Rock Aggregates on Performance of Concrete
30(2)
2.2.1 Effects on Strength
30(2)
2.2.2 Effects of Rock Mechanical Property on Other Performances of Concrete
32(1)
2.3 Two Different Opinions
32(3)
2.3.1 Different Opinions About Rock Strength Requirement in Specification
32(1)
2.3.2 Utilization of Gravel
33(1)
References
34(1)
3 Core Raw Material---Cement
35(12)
3.1 Effects of Cement Property Indexes on Concrete performance
35(4)
3.2 Overview of Cement Production Process
39(1)
3.3 Effect of Modern Cement Production Process on Quality of Concrete
40(3)
3.4 Where Is the Correct Direction of Cement Production Technology?
43(2)
3.5 Conclusions
45(2)
References
45(2)
4 Alkali-Aggregate Reaction, Where Are You?
47(6)
References
52(1)
5 Is Air-Entraining Agent a Panacea for Solving Frost Resistance Problem?
53(16)
5.1 Freeze--Thaw Damage on Engineering
53(3)
5.2 World-Recognized Measure for Enhancing Frost Resistance---Adding Air-Entraining Agent
56(3)
5.3 Overview of Freeze--Thaw Damage Theory
59(1)
5.4 Research on Method and Measure for Enhancing Frost Resistance of Practical Engineering
60(2)
5.5 What is the Correct Method and Range of Using Air-Entraining Agents (AEAs)
62(5)
5.6 Conclusions
67(2)
References
67(2)
6 Breeding and False Setting, Which Is Better?
69(14)
6.1 Reasons for Breeding
70(6)
6.2 Reasons for False Setting
76(5)
6.3 Detriment of Breeding and False Setting
81(1)
6.4 Prevention Method for Breeding and False Setting
81(2)
References
82(1)
7 Fiber, When Is Useful?
83(8)
7.1 Fate and Experiences in Fiber-Reinforced Concrete
83(1)
7.2 Experimental Method and Conclusion
84(3)
7.3 Reason Analyzing
87(2)
7.4 Conclusions
89(2)
References
89(2)
8 Cancer of Modern Concrete---Cracks
91(16)
8.1 Summary
91(3)
8.2 Cause Analysis
94(4)
8.2.1 Fine Questions Which Field Engineers Are Unable to Solve
94(2)
8.2.2 Seven Problems Difficult to Solve
96(1)
8.2.3 Eleven Problems Able To Solve
97(1)
8.3 Category of Cracks
98(4)
8.3.1 Cracks of Water Loss
99(1)
8.3.2 Temperature Crack
99(1)
8.3.3 Drying Shrinkage Crack
100(1)
8.3.4 Stress Cracks
100(2)
8.4 Cause, Detriment, and Prevention of Dehydration Crack
102(5)
8.4.1 Causes for Dehydration Crack
103(1)
8.4.2 Harm of Dehydration Crack
103(1)
8.4.3 Prevention and Treatment for Dehydration Crack
104(1)
References
105(2)
9 Fly Ash, Really Only Advantages?
107(14)
9.1 Problems Unsolved in the Utilization of Fly Ash
107(2)
9.1.1 Problems Unsolved Theoretically
107(1)
9.1.2 Unsolved Technological Problems in Engineering
108(1)
9.2 Several Practical Projects
109(10)
9.2.1 The Concrete Surface of a Parking Apron in South China
109(3)
9.2.2 The Concrete Surface of a Parking Apron in North China
112(1)
9.2.3 Universal Harmless Cracks Phenomena in the Construction of Airport
113(1)
9.2.4 The Floorslab of Terminal Buildings in an Airport in North China
113(2)
9.2.5 Floor in a Plant in Southwest China
115(2)
9.2.6 Other Cases
117(2)
9.3 Conclusions
119(2)
References
120(1)
10 Admixtures: All Medicines Have Their Own Side Effects
121(10)
10.1 Negative Effects of Several Main Chemical Admixtures of the Author
121(3)
10.1.1 Water Reducer
121(1)
10.1.2 Air-Entraining Agent
122(1)
10.1.3 Expansive Agent
123(1)
10.1.4 Early-Strength Agent
123(1)
10.2 Serious Quality Accident Caused by Improper Chemical Admixture Dosage
124(4)
10.2.1 Water Reducer
124(1)
10.2.2 Retarding Agents
125(2)
10.2.3 Early-Strength Agent
127(1)
10.2.4 Others
127(1)
10.3 What Is the Correct Using Method of Chemical Admixtures?
128(1)
10.4 Conclusions
128(3)
References
129(2)
11 Fatal Factor for Durability: Drying Shrinkage
131(18)
11.1 Generating Process of Drying Shrinkage Crack
131(1)
11.2 Harm of Dehydration Crack
132(13)
11.2.1 Drying Shrinkage Crack has Great Effects on Flexural Strength and Directly Threatens Safety of Concrete Structure
135(2)
11.2.2 Structures Destroyed Directly in Some Regions
137(3)
11.2.3 Frost Resistance and Impermeability of Pavement Concrete are Decreased in Cold Regions
140(1)
11.2.4 The Durability and Security of Thin-Walled Structure and Reinforced Concrete Structure with Small Protection Layer
140(4)
11.2.5 In Some Regions in the South and North, Drying Shrinkage Crack is also Manifested as a Kind of Shallow and Harmless Crack Which has no Practical Effects on Security and Durability of Engineerings
144(1)
11.3 Causes for Drying Shrinkage Crack
145(2)
11.4 Conclusions
147(2)
References
148(1)
12 Physician of Concrete---Self-healing
149(16)
12.1 Discovery of Self-curing Phenomenon
149(8)
12.2 Cause Analysis
157(1)
12.3 Application of Self-curing Principle During Practical Engineering
158(4)
12.4 Conclusions
162(3)
13 High-Performance Concrete, Really High Performance?
165(6)
13.1 Difference Between Normal Concrete and High-Performance Concrete
165(3)
13.2 Comparison of Application Effect During Practical Engineering
168(1)
13.3 Conclusions
169(2)
References
170(1)
14 What Is the Correct Idea for Durability Research?
171(8)
14.1 Reason for Poorer Durability and Research Mistakes
171(2)
14.2 Correct Method for Solving Durability Problem
173(4)
14.3 Conclusions
177(2)
References
177(2)
15 Scientific Foundation of Modern Concrete
179(22)
15.1 Discovery of Problems
180(3)
15.2 Conception of the Second-stage Concrete
183(3)
15.3 "Three-Stage Hypothesis"
186(6)
15.4 Cause Analysis
192(4)
15.5 Scientific Meaning of Three-stage Theory Toward Modern Concrete
196(2)
15.6 Conclusions
198(3)
References
199(2)
16 Summary Report of Experimental Study on Dehydration Crack Appearing in the Construction of Turpan Civil Airport Cement Concrete Pavement
201(58)
16.1 Experimental Meaning and Purpose
201(3)
16.1.1 Experimental Meaning
202(1)
16.1.2 Aims of the Experiments
203(1)
16.2 Experimental Program
204(13)
16.2.1 Emerging Time, Size, Shape, and Character of Dehydration Crack
204(1)
16.2.2 Harmfulness of Dehydration Crack
205(2)
16.2.3 Causes for Generation of Dehydration Crack
207(1)
16.2.4 Experimental Program
207(8)
16.2.5 Organizations and Division of Labor
215(2)
16.3 Experimental Procedures
217(23)
16.3.1 Preparation of Materials, Crews, and Machines
217(1)
16.3.2 Concrete Mix Proportion
217(2)
16.3.3 Process Controlling
219(11)
16.3.4 Process of Curing and Observing
230(4)
16.3.5 Experiment on Penetration Speed
234(3)
16.3.6 Experiment on Water-to-Cement Ratio (W/C)
237(3)
16.4 Experimental Summary and Conclusion
240(13)
16.4.1 Introduction
240(1)
16.4.2 Summary on Environment Climate Influence
240(2)
16.4.3 Summary on Raw Materials
242(2)
16.4.4 Summary on Concrete Mix Proportion
244(3)
16.4.5 Summary on Adding Polyester Fiber
247(2)
16.4.6 Summary on net- shaped Crack
249(2)
16.4.7 Summary on Construction Technology
251(2)
16.4.8 General Conclusions
253(1)
16.5 Total Requirements for Construction of Concrete Used in Turpan Airport
253(6)
16.5.1 Requirements for Construction Preparation
254(1)
16.5.2 Controlling of Construction Process
254(4)
References
258(1)
Appendix A 259(8)
Appendix B 267(4)
Appendix C 271
Yang Wenke is a distinguished senior engineer at China Airport Construction Group Corporation, CAAC. His research areas are focused on chemical synthesis and processing of building materials, construction of airport and development of materials.

He received a number of awards for excellence in guiding the construction engineering of airport such as the National Construction Project Luban Prize (the highest construction prize in China) and Silver Award in Construction. He served as a member of China Concrete Quality Committee, a member of China Commercial Concrete Experts Committee, a member of China Concrete Durability Committee, a member of China Concrete Engineering and Technology Experts Committee and a professor at East China Jiaotong University.

His research was directed primarily to building materials, in particular construction of concrete and published over 20 papers in Chinese well-known journals such as concrete, cement etc.
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