309.2R-98: Identification and Control of Visible Effects of Consolidation on Formed Concrete Surfaces (Reapproved 2005)

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This report provides guidelines for identifying and controlling visible effects of consolidation on precast or cast-in-place formed concrete surfaces. It includes a summary of direct and indirect causes of such imperfections. An outline to assist in the reporting on surfaces and photographs to illustrate typical concrete blemishes are also included.


Document Details

Author: ACI Committee 309

Publication Year: 2017

Pages: 11

ISBN: 9780870310188

Categories: Consolidation

Formats: PDF

This document is Historical

Table of Contents

Chapter 1--General

Chapter 2--Factors causing effects

2.1--Design of structural members



2.4--Properties of fresh concrete



2.7--Special construction conditions

Chapter 3--Surface defects


3.2--Air surface voids


3.4--Aggregate transparency

3.5--Subsidence cracking

3.6--Color variation

3.7--Sand streaking

3.8--Layer lines

3.9--Form offsets

3.10--Cold joints

Chapter 4--Minimizing surface defects

Chapter 5--Consolidation of preplaced aggregate concrete

Chapter 6--Conclusion

Chapter 7--References

7.1--Recommended references

7.2--Cited references

Chapter 8--Surface condition outline


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