305R-99
Hot Weather Concreting
2000, 20 pp.
$46.50

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.

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