Effect of Chemical Admixtures on Properties of Concrete Using River Sand, Manufactured Sand and Sea Sand

Abstract: The main problems faced by the construction industry such as setting time, workability and strength of the concrete can be solved by adding chemical admixtures. This report explains the effect of chemical admixtures such as polycarboxylate (PC), polycarboxylic ether (PCE), lignosulfonate and naphthalene based admixture on properties of concrete. This study was carried out to determine the effectiveness of concrete mixture, by changing the conventional raw material with PC, PCE, lignosulfonate and naphthalene based admixture, in different concrete mixture. The test results show that compressive strength increases with the addition of chemical admixtures in River sand, manufactured sand and Sea sand in all grades. Furthermore, tensile strength increases with the addition of chemical admixture. Also the study revealed, higher compressive strengths was achieved through replacement of sea sand compared to River and M sand in all grades.

Keywords: Chemical admixtures, manufactured sand, sea sand, compressive strength.

1. INTRODUCTION

Figure 1 Global CO2 Production (World Business Council for Sustainable Development, 2005)

2. EXPERIMENTAL DETAILS

2.1. Materials

2.2. Test Variables

Table 1 Test variables

Variables Options

2.3. Testing

3. RESULTS AND DISCUSSION

3.1. Slump test for fresh concrete

.

(c) Sea Sand

Figure 2 Slump Variation for Grade 30

(a) River Sand (b) M-Sand

Figure 3 - Slump Variation for Grade 60

Figure 4 Slump Variation for Grade 100 with Silica Fume

3.2. Compressive strength

(a) River Sand

(c) Sea Sand

(a) River Sand

(b) M-Sand

(c) M-Sand with Fly Ash (d) Sea Sand

(b) M-Sand

Figure 5 Compressive Strength Variation

(a) Grade 30 (b) Grade 100

(c) Grade 60

3.3. Splitting tensile strength

(c) Grade 60 Figure 6 Splitting Tensile Strength Variation

3.4. Cost analysis

(a) Grade 30 (b) Grade 100

Figure 7 Cost of Concrete Mixtures

4. CONCLUSIONS

5. REFERENCES

Specification for aggregates from natural sources for concrete

Mixing water for concrete

Concrete Mix Design, Quality Control and Specification

Use of Manufactured Sand in Concrete and Construction An Alternate to River Sand.

Indian Journal of Science and Technology,

The Cement Sustainability Initiative Progress Report

(a) Grade 30 (b) Grade 100

(c) Grade 60