SUPERPLASTICIZED CONCRETE IN HOT WEATHER

It is known that hot weather adversely affects some of the properties of both fresh and hardened concrete. The most affected characteristics of fresh concrete are: increased water requirement, shorter setting time, slump loss, increased plastic shrinkage. Most of the affected properties of hardened of hardened concrete follow from the increased water requirements of fresh concrete. Increased rates of temperature rise at early ages complicate the situation further. In recent years new types of concrete additives, commonly known as superplasticizers, have appeared on the market. The authors briefly describe the different types of superplasticizer and their modes of operation. It is shown that some of the adverse effects of hot weather could be counteracted by selecting the right type and proportion of superplasticizer. The properties which could be influenced are: water requirement, setting time, rate of temperature rise at an early age. For the covering abstract of the Congress see TRIS 378413. (TRRL)

• Supplemental Notes:
  • This reports was presented at the General and Working Sessions of the VII ERMCO Congress and Exhibition, London, May 22-26, 1983. Concrete Technology, Working Sessions W11A, W12A.
• Corporate Authors:

  British Ready Mixed Concrete Association

  Shepperton House, Green Lane
  Shepperton, Middlesex,   England 
• Authors:
  • Collepardi, M
  • Chatterji, S
  • Corradi, M
• Publication Date: 1983

Media Info

• Features: Figures; Tables;
• Pagination: 8 p.

Subject/Index Terms

• TRT Terms: Concrete; Concrete hardening; Conferences; Hardness; Heat; Hot weather; Losses; Physical properties; Plasticity; Plasticizers; Setting (Concrete); Shrinkage; Slump test; Superplasticizers; Temperature; Water; Water consumption; Weather
• Uncontrolled Terms: Concrete properties; Increase; Setting time; Slumps; Young concrete
• Old TRIS Terms: Concrete shrinkage; Water requirements
• ITRD Terms: 4755: Concrete; 8525: Conference; 4750: Fresh concrete; 4722: Hardening; 6743: Heat; 9032: Increase; 5922: Plasticity; 4725: Plasticizer; 4723: Setting (concrete); 4743: Shrinkage; 6722: Temperature; 4355: Water; 2545: Weather
• Subject Areas: Highways; Materials; Planning and Forecasting; I32: Concrete; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00378437
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Dec 30 1983 12:00AM