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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: 

SP116-06

Date: 

August 1, 1989

Author(s):

Ronald P. Webster and Lawrence E. Kukacka

Publication:

Symposium Papers

Volume:

116

Abstract:

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.

DOI:

10.14359/2331

Document: 

SP116-02

Date: 

August 1, 1989

Author(s):

Ulrich Zanke

Publication:

Symposium Papers

Volume:

116

Abstract:

A program for the evaluation of discharge in line-drainage systems was developed. Complex hydraulic situations are treated, such as lateral inflow varying along the drainage channel with respect to the shape of the drainage area. Sudden changes in the cross sections and flow hindering structures are to be treated. Additionally, sand may be accumulated in the channels and the maximum possible accumulation can be known for a given runoff. The programs were checked against hydraulic investigations.

DOI:

10.14359/3175

Document: 

SP116-12

Date: 

August 1, 1989

Author(s):

William C. McBee, Harold Weber, and Frank E Ward

Publication:

Symposium Papers

Volume:

116

Abstract:

Composite materials based on sulfur polymer cement (SPC) and mineral aggregate have been developed by the U.S. Bureau of Mines as part of a program to utilize abundant mineral resources. Program goals are to develop durable, chemically resistant construction materials to increase productivity in the chemical, fertilizer, and metallurgical industries by lowering maintenance costs for labor, energy, equipment, and material. This paper describes the research related to development of SPC, the sulfur concrete (SC), and the industrial testing, together with commercial-scale equipment development and large-scale construction practices. Thermoplastic SPC is produced commercially by reacting cyclic olefinic hydrocarbon chemical modifiers with elemental sulfur at 300 F (149 C) in a sealed chemical reactor. The molten SPC is mixed with mineral aggregates, producing a high-strength concrete product with an average compressive strength of 7000 psi (48 MPa) upon cooling. State-of-the-art production and construction techniques are described. Currently, SC materials are showing superior performance characteristics to portland cement concrete (PCC) in special industrial applications where corrosive environments exist.

DOI:

10.14359/3501

Document: 

SP116-01

Date: 

August 1, 1989

Author(s):

Brian D. Irvin

Publication:

Symposium Papers

Volume:

116

Abstract:

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.

DOI:

10.14359/2249

Document: 

SP116-07

Date: 

August 1, 1989

Author(s):

D. J. Rodler, D. P. Whitney, D. W. Fowler, and D. L. Wheat

Publication:

Symposium Papers

Volume:

116

Abstract:

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.

DOI:

10.14359/2764

123

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