Durable, High Performance
Cement & Concrete
with
Mineral & Chemical Admixtures
Two-Day Training Course for Professionals Working in Cement Concrete
and Construction Industry Pune, India
Introduction
The behavior of a structural system throughout its life is the primary concern of
an engineer. The training programme has been designed keeping in mind the requirements of structural engineers and of those who are engaged in manufacturing concrete. It should also also be useful for students of civil engineering, both at undergraduate and postgraduate levels.
The focus of the training is making good, that is, workable and durable,
concrete. The physical, mineralogical, and chemical characteristics of mineral
admixtures are discussed keeping that aspect in mind. As the programme has been designed for civil engineers, references to complex issues on microstructure or chemistry have been presented to an extent that help better understanding of the application of mineral admixtures in practice.
It is now an established fact that durable concrete means concrete with fewer microcracks (10–100 μm). Microcracks in concrete allow ingress of external deteriorating agents such as water, carbon dioxide, chlorides, sulfates, and so on, leading to the deterioration, distress, and destruction of the structure. They can be reduced by using pozzolanic or cementitious materials, collectively called mineral admixtures, to replace cement in concrete. The term includes all siliceous and aluminous materials, which, in finely divided form and in the presence of water, react chemically with the calcium hydroxide generated during cement hydration to form additional compounds possessing cementitious properties. They may be naturally occurring materials, industrial and agricultural wastes or by-products, or materials that require less energy to manufacture. The mineral admixtures covered under the scope of this training are pulverized fuel ash (PFA), blast furnace slag (BFS), silica fume (SF), rice husk ash (RHA) and metakaolin (MK).
C-S-H is a principal strength-giving compound in the hardened concrete. The formation of additional cementitious compounds during secondary hydration leads to a reduction in temperature rise and refinement of pore structure in the hardened concrete. Calcium hydroxide is considered as a weak link in the concrete structure. The consumption of calcium hydroxide to form strength-giving phases, principally C-S-H, during hydration leads to improved durability of the structure in terms of its resistance to deterioration through carbonation, corrosion, sulfate attack, alkali–silica reaction, and so on. Besides the chemical (pozzolanic or cementitious) reaction, the mineral admixtures also act physically. The finely divided particles act as fillers. This is particularly significant in the interfacial zone, where they produce denser packing at the cement paste–aggregate particle interface, reduce the amount of bleeding, and produce a more homogeneous microstructure and a narrower transition zone. The overall effect is the enhancement in the strength and durability or the service life of concrete structures. These aspects shall be discussed during the course.
The understanding of the materials aspects of the mineral admixtures and their impact on the hydration, strength, and durability of concrete will make a positive contribution, encouraging greater and more fruitful utilization of these and even other wastes in cement and concrete, and lead to construction of stronger and durable structures, besides ensuring sustainable growth of both the cement and construction industry.
Objective/Learning Outcome
The objective of the training course is to impart deeper knowledge about the contribution of mineral and chemical admixtures in improving strength and durability of concrete. It should equip the practicing engineer make better choice of the type and quality of mineral and chemical admixtures in concrete mix to optimize the cost on one hand, and build structures with greater reliability, on the other. The engineers on site, with the knowledge on the impact of environmental factors that are responsible for distress and deterioration of structures, shall be in a position to take appropriate preventive measures.
Training Course Outline
The course relates to how durability of concrete is achieved by properly incorporating mineral and chemical admixtures in cement and concrete. It includes the aspects related to the manufacturing and processing, physical characteristics, chemical and mineralogical composition, quality control of the mineral admixture and the reported experiences as well as the provisions of national Standards on its addition to cement and concrete. The types of chemical admixtures, especially super-plasticisers are covered in detail. The discussion on hydration, besides presenting the practically relevant aspects of chemistry, covers the impact of the addition of mineral admixtures. The lectures on strength and durability present mechanisms, models, standards and mitigation of concrete deterioration due to carbonation, alkali-aggregate reactions, chloride attack and corrosion of reinforcement, external as well as internal sulphate attack, decalcification and freeze-thaw action. The mineral admixtures covered are: pulverised fuel ash (PFA), blast furnace slag (BFS), silica fume (SF), rice husk ash (RHA), metakaolin (MK). The lectures high performance concrete include basic aspects and case studies. The course includes good number of videos on all topics. The participants share knowledge and experience through group discussions.
Some topics in the course is based on Dr J D Bapat's book and updated information on the subject. Book Tiltle: Mineral Admixtures in Cement and Concrete, CRC Press, Taylor and Francis Group, USA. http://www.crcpress.com/product/isbn/9781439817926
Training Course Topics
The topics covered under the course subjects, given in the Training Course Outline above, are as follows:
Module: I
(a) Pulverised Fuel Ash (PFA): Physical characteristics, chemical and mineralogical composition, PFA from fluidised bed combustion, PFA from co-combustion of bituminous coal and petcoke, processing of standard PFA, ultrafine PFA, quality control of PFA.
(b) Blast Furnace Slag (BFS): Physical characteristics, chemical and mineralogical composition, GGBS quality control, addition of GGBS to cement and concrete.
(c) Silica Fume (SF): Physical, chemical and mineralogical characteristics, addition of SF to concrete.
(d) Rice Husk Ash (RHA): Physical and chemical characteristics and addition of RHA to concrete.
(e) Metakaolin (MK): Physical and chemical characteristics, addition of MK to cement and concrete.
(f) Hydration of Cement: Progress of hydration with time (hydration periods), workability period, setting period or active reaction period, hardening period, major reactions occurring in hydration periods, comparison of hydration of alite (C3S) & belite (C2S) , hydration of cement with mineral admixtures.
(g) Strength and Durability of Concrete: Designing structures for strength and durability, prescriptive approach, performance-based approach, concrete strength, high-performance concrete (HPC), importance of concrete curing, role of mineral admixtures in preventing concrete deterioration, carbonation, alkali–aggregate reactions (AAR), alkali-carbonate reaction (ACR) & alkali-silica reaction (ASR), corrosion, national standards and guidelines on chloride corrosion, external sulfate attack, delayed ettringite formation (DEF), frost or freeze–thaw action.
(h) Chemical Admixtures: Different types of chemical admixtures and their application in making concrete.
(i) Case Studies and Videos: The case studies and videos illustrating the practical applications are presented and discussed.
Module: II
(a) High Performance Concrete: Characteristics. High Strength Concrete, Self Compacting Concrete (SCC), Roller Compacted Concrete (RCC), Pervious Concrete, Light Weight Concrete.
(b) Case Studies and Videos: The case studies and videos illustrating the practical applications are presented and discussed.
Who should Attend
(i) Engineers involved in working and maintenance at construction site (including large site) and interested in learning optimum utilisation of mineral admixtures for strength and durability.
(ii) Engineers working with cement, concrete industry, who frequently face customer queries regarding benefits of blended cement or admixtures.
(iii) Engineers working with manufacturers and suppliers of chemical admixtures and mineral admixtures for cement and concrete, interested in knowing how these admixtures are effectively used in concrete.
(iv) Engineers working on product development, get opportunity to share views with the participants.
(v) Faculty from engineering colleges
(vi) Students/teachers/researchers interested in pursuing studies in the area.
Successful candidates will be given certificate of training.
Duration and Venue
Duration: Two days. One day each for Module: I and Module: II.
Venue: Suitable venue at Pune
Visit the link to register for this course: http://www.drjdbapat.com/professional-training
*
concrete. The physical, mineralogical, and chemical characteristics of mineral
admixtures are discussed keeping that aspect in mind. As the programme has been designed for civil engineers, references to complex issues on microstructure or chemistry have been presented to an extent that help better understanding of the application of mineral admixtures in practice.
It is now an established fact that durable concrete means concrete with fewer microcracks (10–100 μm). Microcracks in concrete allow ingress of external deteriorating agents such as water, carbon dioxide, chlorides, sulfates, and so on, leading to the deterioration, distress, and destruction of the structure. They can be reduced by using pozzolanic or cementitious materials, collectively called mineral admixtures, to replace cement in concrete. The term includes all siliceous and aluminous materials, which, in finely divided form and in the presence of water, react chemically with the calcium hydroxide generated during cement hydration to form additional compounds possessing cementitious properties. They may be naturally occurring materials, industrial and agricultural wastes or by-products, or materials that require less energy to manufacture. The mineral admixtures covered under the scope of this training are pulverized fuel ash (PFA), blast furnace slag (BFS), silica fume (SF), rice husk ash (RHA) and metakaolin (MK).
C-S-H is a principal strength-giving compound in the hardened concrete. The formation of additional cementitious compounds during secondary hydration leads to a reduction in temperature rise and refinement of pore structure in the hardened concrete. Calcium hydroxide is considered as a weak link in the concrete structure. The consumption of calcium hydroxide to form strength-giving phases, principally C-S-H, during hydration leads to improved durability of the structure in terms of its resistance to deterioration through carbonation, corrosion, sulfate attack, alkali–silica reaction, and so on. Besides the chemical (pozzolanic or cementitious) reaction, the mineral admixtures also act physically. The finely divided particles act as fillers. This is particularly significant in the interfacial zone, where they produce denser packing at the cement paste–aggregate particle interface, reduce the amount of bleeding, and produce a more homogeneous microstructure and a narrower transition zone. The overall effect is the enhancement in the strength and durability or the service life of concrete structures. These aspects shall be discussed during the course.
The understanding of the materials aspects of the mineral admixtures and their impact on the hydration, strength, and durability of concrete will make a positive contribution, encouraging greater and more fruitful utilization of these and even other wastes in cement and concrete, and lead to construction of stronger and durable structures, besides ensuring sustainable growth of both the cement and construction industry.
Objective/Learning Outcome
The objective of the training course is to impart deeper knowledge about the contribution of mineral and chemical admixtures in improving strength and durability of concrete. It should equip the practicing engineer make better choice of the type and quality of mineral and chemical admixtures in concrete mix to optimize the cost on one hand, and build structures with greater reliability, on the other. The engineers on site, with the knowledge on the impact of environmental factors that are responsible for distress and deterioration of structures, shall be in a position to take appropriate preventive measures.
Training Course Outline
The course relates to how durability of concrete is achieved by properly incorporating mineral and chemical admixtures in cement and concrete. It includes the aspects related to the manufacturing and processing, physical characteristics, chemical and mineralogical composition, quality control of the mineral admixture and the reported experiences as well as the provisions of national Standards on its addition to cement and concrete. The types of chemical admixtures, especially super-plasticisers are covered in detail. The discussion on hydration, besides presenting the practically relevant aspects of chemistry, covers the impact of the addition of mineral admixtures. The lectures on strength and durability present mechanisms, models, standards and mitigation of concrete deterioration due to carbonation, alkali-aggregate reactions, chloride attack and corrosion of reinforcement, external as well as internal sulphate attack, decalcification and freeze-thaw action. The mineral admixtures covered are: pulverised fuel ash (PFA), blast furnace slag (BFS), silica fume (SF), rice husk ash (RHA), metakaolin (MK). The lectures high performance concrete include basic aspects and case studies. The course includes good number of videos on all topics. The participants share knowledge and experience through group discussions.
Some topics in the course is based on Dr J D Bapat's book and updated information on the subject. Book Tiltle: Mineral Admixtures in Cement and Concrete, CRC Press, Taylor and Francis Group, USA. http://www.crcpress.com/product/isbn/9781439817926
Training Course Topics The topics covered under the course subjects, given in the Training Course Outline above, are as follows:
Module: I
(a) Pulverised Fuel Ash (PFA): Physical characteristics, chemical and mineralogical composition, PFA from fluidised bed combustion, PFA from co-combustion of bituminous coal and petcoke, processing of standard PFA, ultrafine PFA, quality control of PFA.
(b) Blast Furnace Slag (BFS): Physical characteristics, chemical and mineralogical composition, GGBS quality control, addition of GGBS to cement and concrete.
(c) Silica Fume (SF): Physical, chemical and mineralogical characteristics, addition of SF to concrete.
(d) Rice Husk Ash (RHA): Physical and chemical characteristics and addition of RHA to concrete.
(e) Metakaolin (MK): Physical and chemical characteristics, addition of MK to cement and concrete.
(f) Hydration of Cement: Progress of hydration with time (hydration periods), workability period, setting period or active reaction period, hardening period, major reactions occurring in hydration periods, comparison of hydration of alite (C3S) & belite (C2S) , hydration of cement with mineral admixtures.
(g) Strength and Durability of Concrete: Designing structures for strength and durability, prescriptive approach, performance-based approach, concrete strength, high-performance concrete (HPC), importance of concrete curing, role of mineral admixtures in preventing concrete deterioration, carbonation, alkali–aggregate reactions (AAR), alkali-carbonate reaction (ACR) & alkali-silica reaction (ASR), corrosion, national standards and guidelines on chloride corrosion, external sulfate attack, delayed ettringite formation (DEF), frost or freeze–thaw action.
(h) Chemical Admixtures: Different types of chemical admixtures and their application in making concrete.
(i) Case Studies and Videos: The case studies and videos illustrating the practical applications are presented and discussed.
Module: II
(a) High Performance Concrete: Characteristics. High Strength Concrete, Self Compacting Concrete (SCC), Roller Compacted Concrete (RCC), Pervious Concrete, Light Weight Concrete.
(b) Case Studies and Videos: The case studies and videos illustrating the practical applications are presented and discussed.
Who should Attend
(i) Engineers involved in working and maintenance at construction site (including large site) and interested in learning optimum utilisation of mineral admixtures for strength and durability.
(ii) Engineers working with cement, concrete industry, who frequently face customer queries regarding benefits of blended cement or admixtures.
(iii) Engineers working with manufacturers and suppliers of chemical admixtures and mineral admixtures for cement and concrete, interested in knowing how these admixtures are effectively used in concrete.
(iv) Engineers working on product development, get opportunity to share views with the participants.
(v) Faculty from engineering colleges
(vi) Students/teachers/researchers interested in pursuing studies in the area.
Successful candidates will be given certificate of training.
Duration and Venue
Duration: Two days. One day each for Module: I and Module: II.
Venue: Suitable venue at Pune
Visit the link to register for this course: http://www.drjdbapat.com/professional-training
*
