kiwijas.blogg.se

It has been reported that MOC suffers a significant loss in its compressive strength when it is immersed in water for 28 days. That means the mechanical strength drops when MOC suffers from a water attack. However, a crucial defect of MOC is its weak water resistance. Thus, MOC is more environmentally friendly and sustainable.

Besides, MOC consumes less energy, and releases less carbon dioxides during its production, since a reduced calcination temperature is required. It is superior to OPC with respect to its rapid setting and hardening properties, excellent abrasion resistance, and good bonding capacity to hold large amounts of various inert fillers. Magnesium oxychloride cement (MOC) is an air-dried magnesia-based cementing material that was developed shortly after ordinary Portland cement (OPC). The developed mortar possesses an eco-friendly nature (simultaneous reuse of various waste materials and improvement of the air quality). Overall, the study provided a feasible and attractive approach to recycle agro- and construction wastes for the production of air purifying mortar.

In addition, the specimens containing CS and SD also had better negative ion-inducing performance due to their higher porosity. Besides, the incorporation of CBP improved the water resistance in a dosage-dependent way. Results showed the flexural strength of MOC was enhanced by the addition of CS and SD. Moreover, tourmaline powder (TP) was added as a negative ion-inducing admixture, at a fixed dosage of 10% by weight of MgO, to bestow air-improving functions on the end products. The agro-wastes referred to corn stalk (CS) and saw dust (SD), which were used to improve the flexural properties of host cementitious material, whilst the construction wastes referred to recycled clay brick powder (CBP), which was employed to enhance compressive strength and water resistance.

This research attempted to develop an environmentally-friendly functional building mortar by the combined use of agriculture wastes (agro-wastes) and construction wastes in magnesium oxychloride cement (MOC).