1 Introduction
2 Principle of Shrinkage Reducing Agent
3 Experiment Plan and Method
3.1 Test Variables
Mix no. | W/C | S/a | P/C | Unit mass (kg/m3) | |||||
---|---|---|---|---|---|---|---|---|---|
W | C | LATEX | S | G | SRA | ||||
Plain | 35% | 55% | 15% | 72 | 400 | 128 | 898 | 746 | – |
SRA 1 | 68 | 4 | |||||||
SRA 2 | 64 | 8 | |||||||
SRA 3 | 60 | 12 | |||||||
SRA 5 | 52 | 20 | |||||||
ED 1 | 35% | 55% | 15% | 72 | 396 | 128 | 898 | 746 | ED: 4 |
Fiber 0.2 | 72 | 400 | Fiber: 0.6 |
3.2 Materials for Use
3.2.1 Cement
3.2.2 Latex
Material | Average particle size (nm) | Solid contents (%) | Viscosity (cps) | Ionicity | pH | Appearance |
---|---|---|---|---|---|---|
SB Latex | 184.6 | 47.1 | 384 | Nonionic | 9.5 | White liquid |
3.2.3 Aggregate
Type | Max Size (mm) | Density (g/cm3) | Absorption (%) | F.M |
---|---|---|---|---|
Fine aggregate | < 5 | 2.6 | 0.71 | 2.98 |
Coarse aggregate | 13 | 2.7 | 0.97 | 6.3 |
3.2.4 Shrinkage Reducing Agent
Type | Moisture content (%) | Density (g/cm3) | pH | Active ingredient (%) |
---|---|---|---|---|
Glycol ether type | 28.2 | 0.98 | 6.5 | 71.8 |