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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Showing 1-5 of 13 Abstracts search results
Document:
SP116-09
Date:
August 1, 1989
Author(s):
Jack J. Fontana and Peter Mendis
Publication:
Symposium Papers
Volume:
116
Abstract:
Liquified natural gas (LNG) is usually stored in large tanks surrounded by impounding dikes. If an accidental spill occurs, the LNG boils off and the vapors form a hazardous, explosive mixture with the atmosphere. The rate of evaporation of the LNG depends on the rate of heat transfer from the dike surface to the liquid gas. If the rate of heat transfer is reduced, the rate of evaporation of the LNG and the creation of hazardous conditions are also reduced. Reduction in heat transfer can be achieved by installing and insulating polymer concrete (IPC) overlay on the surface of the containing dikes. The IPC described in this paper was installed on approximately 56,000 ftý of the floor and 18,000 ftý of the sloped wall areas of the dike. It was based on a special moisture insensitive epoxy polymer concrete binder mixed with multicellular glass beads and ceramic-like shell fines to obtain insulating properties. A flame retardant agent was also added to improve fire resistance. The IPC was mixed in a continuous polymer concrete mixer and spread by vibrating screed. The different application techniques are described.
DOI:
10.14359/3450
SP116-01
Brian D. Irvin
Styrene-butadiene latex modified concrete system is an effective technique for repair and rehabilitation of parking garage decks. The system appears to retard corrosion of the reinforcing steel and has many benefits, including ease of placement and workability, superior flexural and bonding strength, and deicer scaling resistance. Styrene-butadiene latex modified concrete can be applied in parking structures during the winter months with few problems.
10.14359/2249
SP116-07
D. J. Rodler, D. P. Whitney, D. W. Fowler, and D. L. Wheat
Three high molecular weight methacrylate monomer systems were tested to determine their effectiveness in repairing cracked portland cement concrete (PPC). Ultimate strains across repaired cracks, modulus of rupture, and percent of crack filled for slabs repaired with the monomers and stiffnesses of repaired beams were investigated. Tests on small, cracked slabs were also conducted under hot and wet conditions. One hundred thirty-five PCC slabs, 9 PCC beams, and 12 tension specimens were tested. The results varied with respect to the stiffnesses of the polymers. All monomer systems were shown to increase the stiffness of cracked flexural members and to fill cracks as small as 0.1 mm in width. The performance of the systems was affected adversely by moisture and heat. Minimum drying periods after saturation of the cracked concrete with water were determined.
10.14359/2764
SP116-06
Ronald P. Webster and Lawrence E. Kukacka
Results are presented from the preliminary phase of a laboratory test program conducted to identify and evaluate materials for converting hazardous geothermal residues to a nonhazardous and potentially usable form. Laboratory test results indicate that geothermal residues can be effectively incorporated as a fine aggregate into polymer concrete (PC) and portland cement mortar (PCM) composites. PC composites made using an emulsifiable polyester resin and a methyl methacrylate (MMA)-based monomer system exhibited compressive strengths varying between 3700 and 16,500 psi (25.5 and 113.8 MPa), depending upon the type of binder used and the moisture content of the residue. Waste extraction tests (WET) performed on ground samples of the composites indicate elemental levels of leachable heavy metals are below specified soluble threshold limit concentrations (STLC). PCM composites exhibited compressive strengths varying between 2875 and 5530 psi (19.8 and 38.1 MPa), depending upon the type, amount, and moisture content of the residue. WET analysis indicates elemental levels of leachable heavy metals are below specified STLC values for all but one of the PCM composites evaluated.
10.14359/2331
SP116-08
David W. Fowler
Polymer concrete (PC) has attracted significant interest in the past 15 years. It began primarily as a repair material for portland cement concrete, particularly bridges and pavements, and has now attracted considerable interest for other applications. A survey was conducted to determine the predicted needs and trends in the industry. The respondents, representing a wide range of backgrounds, indicated that precast products would have the greatest impact and, among precast products, utility components would lead the way. The greatest needs in the industry were deemed to be lower cost and improved monomers and resins. Many opinions were presented on the needed developments in materials properties. The author also presents his predictions on future trends in monomers and resins, aggregates, equipment, repair, precast products, and overlays. Future needs including improved training, public awareness, and research are discussed.
10.14359/2342
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