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A dozen papers from a June 1992 symposium in Louisville, Kentucky review the current use of organic polymers dispersed in water and formulated to add to portland cement. One sets out the status of ASTM's forthcoming specification and test methods. Others discuss such aspects as solid grade acrylic c
Polymer-modified hydraulic cement mixtures (PMC) are widely used for a variety of applications. The literature to-date on PMC is considerable but little has been published examining the effect of variables within the polymer on the properties of PMC. The work described in this paper attempts to partially fill this void. The studied variables include polymercement ratio, latex particle size, glass transition temperatures, effect of carboxylation and pH value. Also the effect of wet and dry curing of PMC is examined. The theory of polymer-modification of hydraulic cement mixtures is discussed in light of these results.
Mortar and concrete made with portland cement has been a popular construction material in the world for the past 170 years or more. However, cement mortar and concrete have some disadvantages such as delayed hardening, low tensile strength, large drying shrinkage and low chemical resistance. To reduce these disadvantages, polymers have been utilized as an additive. Polymer-modified or polymer cement mortar (PCM) and concrete (PCC) are the materials which are made by partially replacing the cement hydrate binders of conventional cement mortar or concrete, with polymers. This book deals with the principles of polymer modification for cement composites, the process technology, properties and applications of the polymer-modified mortar and concrete, and special polymer-modified systems such as M DF cement, antiwashout underwater concrete, polymer-ferrocement, and artificial I wood. The polymeric admixtures or cement modifiers include latexes or emulsions, redispersible polymer powders, water-soluble polymers, liquid resins and monomers. This book describes the current knowledge and information of polymer-modified mortars and concretes, and discusses or reviews the following items in detail: 1. Principles of polymer modification for cement composites. 2. Process technology of polymer-modified mortars and concretes. 3. Properties of polymer-modified mortars and concretes. 4. Applications of polymer-modified mortars and concretes. 5. Special polymer-modified systems such as MDF cements, antiwashout underwater concretes, polymer-ferrocements, and artificial woods.
This report addresses concrete made with organic polymers combined with hydraulic cement and discusses the polymer systems used to produce polymer-modified concrete, including their composition and physical properties. It explains the principle of polymer modification and reviews the factors involved in selecting appropriate polymer systems. The report also discusses mixture proportioning and constructin techniques for different polymer systems and summarizes the properties of fresh and hardened polymer-modified concrete and common applications.
Chemical admixtures are used in concrete mixtures to produce particular engineering properties such as rapid hardening, water-proofing or resistance to cold. Chemical Admixtures for Concrete surveys recent developments in admixture technology, explaining the mechanisms by which admixtures produce their effects, the various types of admixtures avail
Since the publication of the first edition ten years ago, significant developments have occurred in the use of admixtures in concrete. Eight new chapters and a full update of the preceding ten chapters bring this book up to date; reflecting the relative advances made in the science and technology of different groups of admixtures. The increased role and development of admixtures in concrete technology is evidenced by a number of conferences, publications, and novel admixtures available in the market place. These developments in the field caused the modification of many chapters in the first edition in order to reflect the advances. Although individual chapters refer to standards and specifications of admixtures, those only interested in the standards or techniques used in investigating admixtures will find the second chapter (Research Technologies, Standards, and Specifications) useful. Admixtures are not as inert as may be presumed. They may chemically interact with the constituents of concrete and affect the properties of the fresh and hardened concrete and its durability. The third chapter deals with these aspects. It was important to devote a chapter to recent attempts in developing new admixtures.
Volume is indexed by Thomson Reuters BCI (WoS). The field of “polymers in concrete” is rather well consolidated within the construction industry, and its future will be one of benefiting fully from the synergy between the organic and mineral materials. Concrete-polymer composites (C-PC) exhibit excellent adhesion strength and durability in aggressive environments and the good performance of these materials makes innovative applications possible; including new technologies for restoring and renovating buildings.
THIS CHAPTER ON POLYMER MODIFIED CONCRETE and Mortar is a revision of the original chapter in ASTM STP 169C by Kuhlmann and O'Brien. In January 1987, a Task Group was formed in Subcommittee C09.03.18 (C09.25) due to the need identified for standards development in the area of Polymer Modified Cementitious materials. This Task Group started the process, and then in June of 1989 this activity was organized under a new subcommittee, C09.03.19 (C09.44). Membership in this subcommittee numbers about 50. Committee C09.44 issued Latex and Powder Polymer Modifiers for Hydraulic Cement Concrete and Mortar (C 1438) and Test Methods for Polymer Modified Mortar and Concrete (C 1439) in 1999. These polymer modifiers mainly contribute to adhesion, water resistance, reduced permeability, and increased durability. Polymer modifiers are used in a variety of applications, such as patching compounds, stucco, ceramic tile thin sets and grouts, and bridge deck overlays. The first ASTM sponsored Symposium on Polymer Modified Concrete and Mortar was held in Louisville in June of 1992 with the papers being published in STP 1176 [1]. The current edition reviewed and updated the topics of the previous authors introduced new technology that has been developed and included up to date references.
Climate change is anticipated to have a major impact on concrete structures through increasing rates of deterioration and the impact of extreme weather events. The repair of any damage will be highly labor-intensive and expensive. Self-healing cementitious materials can enable the construction industry to mitigate these effects and move toward greater sustainability, safety, and increased cost savings and efficiency. This book: Examines concrete structures based on various materials with self-repair capability and their implications for future use in sustainable projects. Discusses advantages and design strategies of self-healing concretes. Covers several effective and detailed self-repair methods, with comparative analysis of the advantages and disadvantages of each method. Examines the use of various materials, including polymers and nanomaterials. Reviews factors affecting performance, properties, and applications. Delves into future directions and opportunities. Written for researchers, advanced students, and industry professionals, Self-Healing Cementitious Materials: Technologies, Evaluation Methods, and Applications offers a detailed view of an important emerging technology in materials science, civil engineering, and related fields.
This chapter on Polymer Modified Concrete and Mortar is a new contribution to ASTM STP 169. In January 1987, a Task Group was first formed in Subcommittee C09.03.18 (C09.25) due to the need identified for standards development in the area of Polymer Modified Cementitious materials. This Task Group started the process, and then in June of 1989 this activity was organized under a new subcommittee, C09.03.19 (C09.44) where the work continues. Membership in this subcommittee has grown to 47. This group is working on developing specifications and test methods pertaining to the use of latexes and redispersible dry polymers as modifiers for hydraulic cement concrete and mortars. These polymer modifiers mainly contribute to adhesion, water resistance, reduced permeability, and increased durability. Polymer modifiers are used in a variety of applications, such as, patching compounds, stucco, ceramic tile thin sets and grouts, and bridge deck overlays. The first ASTM sponsored Symposium on Polymer Modified Concrete and Mortar was held in Louisville in June of 1992. A second symposium is in the planning stages for 1995.