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International Concrete Abstracts Portal

Showing 1-5 of 63 Abstracts search results

Document: 

SP79

Date: 

May 1, 1983

Author(s):

Editor: V.M. Malhotra

Publication:

Symposium Papers

Volume:

79

Abstract:

SP79 It's a virtual encyclopedia of what mineral by-products do to concrete--and why. 1196 pages of essential information in 62 clearly defined, easy reference chapters. Key subjects include: effects on durability, fiber reinforced concrete, fly ash, pozzolans, sulfate resistance and concrete workability. With the rapidly increasing usage of by-product additives in concrete, every designer and builder needs the answers which these volumes provide.

DOI:

10.14359/14036


Document: 

SP79-04

Date: 

May 1, 1983

Author(s):

Takeshi Yamato and Hideaki Sugita

Publication:

Symposium Papers

Volume:

79

Abstract:

Three types of cements and three types of fine aggregates, viz seashore sand, crushed stone and a blend of the two were utilized for this study. The water-to-cement ratio by weight ranged from 0.40 to 0.50. All mixes were made at a slump of 10-cm (4-in.) and air content of 4 percent. The blended cement concrete with fly ash showed the lowest shrinkage among the three cement concretes. The creep tests showed similar results. Good workability, high strength, low shrinkage and creep could be achieved using fly ash concretes.

DOI:

10.14359/6687


Document: 

SP79-18

Date: 

May 1, 1983

Author(s):

R.C. Joshi and G.S. Natt

Publication:

Symposium Papers

Volume:

79

Abstract:

Use of sub-bituminous, 'C' fly ashes from Alberta, a province in Western Canada, for producing high fly ash roller compactable concrete or geocrete was investigated. Optimum moisture content and maximum density of each of the mix containing sand and gravel as coarse and fine aggregates respectively, and mixtures of fly ash and cement, and fly ash and lime as cementitious materials were evaluated by geotechnical methods. Compaction and strength characteristics of the mixes containing various proportions of aggregate and cementitious material were evaluated in the labora-tory. Durability characteristics and flexure strength of the selected mixes were also studied. The results indicate that the two subbituminous fly ashes, from Western Canada, can be used to produce high fly ash concrete suitable for pavements and core of gravity dams.

DOI:

10.14359/6701


Document: 

SP79-44

Date: 

May 1, 1983

Author(s):

J.I. Skrastins and N.G. Zoldners

Publication:

Symposium Papers

Volume:

79

Abstract:

This paper describes the use of condensed silica fume in the ready-mixed concrete plant at St. Eustache, P.Q., Canada. The effect of this admixture on the properties of fresh and har-dened concrete is discussed. Efficiency factors for the silica fume-modified concrete are given for different strength levels. Transportation of the fume and special installations at the ready-mixed concrete plant for the handling of condensed silica fume are described.

DOI:

10.14359/6727


Document: 

SP79-49

Date: 

May 1, 1983

Author(s):

Jorma Virtanen

Publication:

Symposium Papers

Volume:

79

Abstract:

The use of ground granulated blast-furnace slag and fly ash has increased considerably in Finland. Silica fume has not been used in concrete in Finland so far, but research on its properties has been carried out for some years. The use of these materials has been limited because of the lack of knowledge on the durability of concrete containing slag, fly ash or silica. The freeze-thaw resistance of concrete has been evaluated using five different methods. Both air-entrained and non-air-entrained concretes were tested.

DOI:

10.14359/6732


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