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Title: 305R-99: Hot Weather Concreting
Year of Publication: 2000
Number of Pages: 20
This document is: Active
Nonmember Price: $39.50
ACI Member Price: $25.00
Order Code: 30599
Abstract: Hot-weather concreting can cause plastic-shrinkage cracking, accelerated setting, increased slump loss, and decreased strength. Are you prepared to solve these problems? ACI can help. ACI 305R-99 identifies problems created by hot-weather concreting and describes practices that will alleviate these potential adverse effects. Among these practices are pre-cooling ingredients, controlling concrete temperature as placed, considering length of haul, providing facilities for handling concrete at the site, and using special batching, placing, and curing techniques. Low-strength test results in hot weather are often caused by poor protection and initial curing of test specimens. ACI 305R-99 provides detailed instructions for ensuring that specimens are properly cured. Keywords: air entrainment; cooling; curing; evaporation; high temperature; hot weather construction; plastic shrinkage; production methods; retempering; slump tests; water content.
Contents: Chapter 1--Introduction 1.1--General 1.2--Definition of hot weather 1.3--Potential problems in hot weather 1.4--Potential problems related to other factors 1.5--Practices for hot weather concreting Chapter 2--Effects of hot weather on concrete properties 2.1--General 2.2--Temperature of concrete 2.3--Ambient conditions 2.4--Water requirement 2.5--Effect of cement 2.6--Supplementary cementitious materials 2.7--Chemical admixtures 2.8--Aggregates 2.9--Proportioning Chapter 3--Production and delivery 3.1--General 3.2--Temperature control of concrete 3.3--Batching and mixing 3.4--Delivery 3.5--Slump adjustment 3.6--Retempering Chapter 4--Placing and curing 4.1--General 4.2--Preparations for placing and curing 4.3--Placement and finishing 4.4--Curing and protection Chapter 5--Testing and inspection 5.1--Testing 5.2--Inspection Chapter 6--References 6.1--Specified references 6.2--Recommended references Appendix A--Estimating concrete temperature Appendix B--Methods for cooling concrete
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