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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: 

SP107-07

Date: 

June 1, 1988

Author(s):

C. H. Murphree

Publication:

Symposium Papers

Volume:

107

Abstract:

Forming economical concrete is discussed from the contractor's viewpoint. Two major concrete projects are used to compare manufactured and job-built systems for economy and quality. The contractor reveals his estimated and actual prices. The re-use of form panels, up to 72 times, produces real economy and achieves quality. The "team approach" in selecting the right system is used and recommended.

DOI:

10.14359/3635

Document: 

SP107-10

Date: 

June 1, 1988

Author(s):

J. M. Shilstone, Jr.

Publication:

Symposium Papers

Volume:

107

Abstract:

A contractor's construction requirements include different factors than are normally considered in concrete mix proportioning. Changes in materials and job conditions during construction can affect concrete and its ability to meet the contractor's construction needs. Computerized analysis of aggregate gradations and concrete mix proportions from project submittals help reveal potential workability problems that will impact pumping, economy, and finishing. Statistical analysis of concrete test results can reduce concrete cost by using the ACI Building Code to determine minimum average strength requirements. Ongoing analysis of changing materials and job conditions can predict and resolve problems rapidly and, therefore, minimize delays. Two computer programs, seeMIX and seeSTAT, are used to demonstrate how computer analysis can aid construction projects.

DOI:

10.14359/3653

Document: 

SP107-12

Date: 

June 1, 1988

Author(s):

M. Linetsky

Publication:

Symposium Papers

Volume:

107

Abstract:

Presents design and applications of machinery for on-site manufacture and erection of concrete wall panels and roof slabs to create single-story buildings. The precast components are produced and erected with trailer-mounted rotatable and lifting forms. The basic plant requires two or more technological cycles to erect a bay, while a modified version can build a single-room bay in one cycle. Sizes of the bays and design of the structures are intended to meet housing requirements in developing and industrialized countries. Due to the simplicity of the design, high productivity of the machinery and diversity of the product, the suggested forming system can be an effective craneless method of precast concrete construction.

DOI:

10.14359/3386

Document: 

SP107-03

Date: 

June 1, 1988

Author(s):

J. Zimmerman

Publication:

Symposium Papers

Volume:

107

Abstract:

Air-supported forming represents a rapid and cost-effective technique for building long span, thin shell, monolithic concrete structures. This construction method consists of inflating an air form, designed to the required building size and shape, after attachment to a foundation ring. Once inflated, the inside skin of the air form is sprayed with polyurethane foam. Steel reinforcement is fastened to the inside surface of the foam. Concrete is sprayed over the steel reinforcement, again from the inside. Steel is not placed, and concrete is not sprayed where shell openings are required. The air form can be color-coated and textured, or removed for reuse when protective coatings are applied over the exposed foam. This technology is appropriate for free-span architectural applications, bulk storage of granulated solids, and liquids.

DOI:

10.14359/3346

Document: 

SP107-01

Date: 

June 1, 1988

Author(s):

W. R. Anthony

Publication:

Symposium Papers

Volume:

107

Abstract:

This text moves from a macro view of the entire building process toward a micro view of the specific details, in an effort to maximize the value of a site-cast concrete building frame. It starts with an economic overview of the development process, including a budget analysis of a concrete framed building. A case is made for three basic principles that lead to constructability, allowing for efficiency during the construction of a site-cast concrete building from a formwork perspective. The text focuses on both horizontal and vertical design strategies, then attempts to integrate these concepts into a total project strategy using a 10-step approach. This paper stresses the need for teamwork. Teamwork is the key to achieving economy in the construction process, and good communications among all parties facilitates the team effort. The text is the product of a collaborative effort by the concrete construction division of a corporation. Their findings and recommendations were organized and integrated by the author. Additional resources are noted at the end of the article.

DOI:

10.14359/3339

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