report on concrete admixtures for waterproofing construction防水建造工程的混凝土外加剂报告.pdf

Report
on
Concrete Admixtures
for
Waterproofing Construction





Structural Engineering Branch
Architectural Services Department







By: Raymond W. M. Chan
Peter N. L. Ho &
Eric P. W. Chan


December 1999
Content
Page No.


Introduction 1

Definition of Admixtures 1

Requirements for Water-retaining Structures 1

Effects by Application of Admixtures in Water Retaining 4
Structures

Types of Admixtures 5

Retarding/Water Reducing Admixtures 5
Materials 6
Effects of Retarding/Water Reducing Admixtures 6
on Concrete Properties

Superplasticizers 8
Materials 9
Effects of Superplasticizers on Concrete Properties 9

Polymer Admixtures 11
Materials 11
Effects of Polymer Admixtures on Concrete 12
Properties

Mineral Admixtures 12
Materials 13
Effects of Mineral Admixtures on Concrete 14
Properties
Silica Fume 16
Rice Husk Ash 18
Pulverized Fuel Ash 18
Ground Granulated Blastfurnace Slag 19
Other Slags 20
use of Mineral Admixtures 20

Air-Entraining Admixtures 20
Materials 20
Effects of Air-Entraining Admixtures on Concrete 21
Properties
Page No.

Miscellaneous Admixtures 22
Pumping Aids 22
Corrosion Inhibitors 22
Shrinkage Reducing Admixtures 23

Waterproofing Admixtures 24
Integral Waterproofing Admixtures 24
Hydrophobic and Pore Blocking Ingredient 24

Admixture Products 27
Retarding to BS5075: Part 1 27
Normal Water Reducing to BS5075: Part 1 27
Accelerating Water Reducing to BS5075: Part 1 28
Retarding Water Reducing to BS5075: Part 1 28
Air Entraining to BS5075: Part 2 28
Superplasticizers to BS5075: Part 3 29
Retarding Superplasticizers to