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Improved technology for spun-cast concrete poles

Technical Report:

Abstract

Different types of concrete were investigated with the goal of developing concrete suitable for the production of spun-cast concrete poles. A total of 65 different concrete mixes were investigated, with the suitability criteria defined as: compactability, no segregation of the mix components during the spinning operation, no shrinkage cracking, high strength, and durability. High strength normal weight concretes and semi-lightweight concretes, both with and without fly ash and/or silica fume and with different types of admixtures were used to produce spun-cast concrete pole segments. Of the 35 lightweight concretes only 3 were considered successful, as in all other specimens the inner layer of coarse aggregate was not well embedded in the mortar, and many mixes could not be compacted properly because they were too stiff, too wet, or started to set before spinning commenced. The three successful specimens contained fly ash and one contained silica fume, and had low water/cement ratios (0.26 to 0.29). Of the 23 normal weight concretes tested, only 5 were considered suitable, and all these had a sand/coarse aggregate ratio of 0.25 or smaller and a cement content between 350 and 400 kg/m{sup 3}. A theoretical study of the stresses in the end zones of pretensioned  More>>
Publication Date:
Jul 01, 1984
Product Type:
Technical Report
Report Number:
CEA-136D254; CE-03979
Reference Number:
CANM-91-001381; EDB-92-002123
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION; OVERHEAD POWER TRANSMISSION; SUPPORTS; CASTING; CONCRETES; SPIN; ANGULAR MOMENTUM; BUILDING MATERIALS; FABRICATION; MATERIALS; MECHANICAL STRUCTURES; PARTICLE PROPERTIES; POWER TRANSMISSION; 240303* - Power Transmission Lines & Cables- Overhead Lines- (1990-)
OSTI ID:
6206650
Research Organizations:
Diliger-Ghali Civil Engineering Consultants Ltd., Calgary, AB (Canada)
Country of Origin:
Canada
Language:
English
Availability:
Canadian Electrical Association, One Westmount Square, Suite 1600, Montreal, PQ, CAN H3Z 2P9.
Submitting Site:
CANM
Size:
Pages: (140 p)
Announcement Date:

Technical Report:

Citation Formats

Dilger, W H, and Ghali, A. Improved technology for spun-cast concrete poles. Canada: N. p., 1984. Web.
Dilger, W H, & Ghali, A. Improved technology for spun-cast concrete poles. Canada.
Dilger, W H, and Ghali, A. 1984. "Improved technology for spun-cast concrete poles." Canada.
@misc{etde_6206650,
title = {Improved technology for spun-cast concrete poles}
author = {Dilger, W H, and Ghali, A}
abstractNote = {Different types of concrete were investigated with the goal of developing concrete suitable for the production of spun-cast concrete poles. A total of 65 different concrete mixes were investigated, with the suitability criteria defined as: compactability, no segregation of the mix components during the spinning operation, no shrinkage cracking, high strength, and durability. High strength normal weight concretes and semi-lightweight concretes, both with and without fly ash and/or silica fume and with different types of admixtures were used to produce spun-cast concrete pole segments. Of the 35 lightweight concretes only 3 were considered successful, as in all other specimens the inner layer of coarse aggregate was not well embedded in the mortar, and many mixes could not be compacted properly because they were too stiff, too wet, or started to set before spinning commenced. The three successful specimens contained fly ash and one contained silica fume, and had low water/cement ratios (0.26 to 0.29). Of the 23 normal weight concretes tested, only 5 were considered suitable, and all these had a sand/coarse aggregate ratio of 0.25 or smaller and a cement content between 350 and 400 kg/m{sup 3}. A theoretical study of the stresses in the end zones of pretensioned poles is presented. 10 refs., 53 figs., 14 tabs.}
place = {Canada}
year = {1984}
month = {Jul}
}