**Author details**

**6. Conclusion**

168 Cement Based Materials

This study was conducted to alter cement in mud concrete technology. Mud concrete is a novel walling material discovered to alter compressed earth blocks. The concept of mud concrete block is to build concrete by soil. Sand and metal of concrete are replaced by a fraction of the soil. The precise gravel percentage governs the strength of mud concrete. The cement in this concrete is also used as a stabilizer. But the cement has this weakness of initial cost and the heavy carbon footprint. If cement in mud concrete can be replaced with a much greener

The study was conducted after a series of nature studies and literature studies. In addition, the folk knowledge also has been considered prior to the experimenting with stabilizers. Then, the study builds an inventory of possible stabilizer which may replace the cement and act as a stabilizer for soil. At the very beginning, the study was focused to develop natural polymer-based stabilizer because ancient Sri Lankan ancestors used natural polymers to stabilize the earth and build gigantic structures and plastered them with frescos. However, the utilization of natural polymers was an utter failure due to the availability of materials. The experiment with natural latex rubber and mud concrete

stabilizer, mud concrete can be recommended as a greener walling material.

**Figure 19.** Fly ash geopolymerized mud concrete masonry unit wall.

Chameera Udawattha\* and Rangika Halwatura \*Address all correspondence to: udawatthe@gmail.com University of Moratuwa, Sri Lanka
