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This synthesis wil be of interest to materials engineers, construction engineers, maintenance engineers, pavement contractors and others interested in the use of latex-modified mortars (LMM) and concretes ( LMC). Information is provided on material properties of various LMM and LMC, as well as current construction practices used for LMM and LMC. Potential applications for LMM and LMC are also included. The use of innovative modified portland cement mortars and concretes for construction and maintenance applications is growing. This report of the Transportation Research Board describes the current state of the practice with respect to the use of latex-modified portland cement concretes and mortars. The extent of use of each material (including case histories), based on results of surveys of state highway agencies and a review of the literature, is summarized.
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.
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
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.
This broad-based, introductory reference provides excellent discussions regarding the hydration of Portland cement, durability problems in concrete, mechanisms of concrete deterioration, and interaction of polymers in concrete. It also covers properties of concrete with added polymers and practical applications of polymers in concrete. The historic background of polymers in building materials is examined, and a comprehensive comparison of natural vs. synthetic polymers is provided and conveniently summarized in a tabular format.
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.