Resumen de The effect of local pozzolans and lime additions on the mineralogical, physical and mechanical properties of compressed earth blocks in Argentina
Santiago Pedro Cabrera, Kerstin Elert, Anabela Guadalupe Guilarducci, Andrea Margasin
The purpose of this research is to evaluate the mineralogical, physical and mechanical properties of compressed earth blocks (CEBs) stabilized with lime and mineral admixtures easily obtained in Argentina: natural pozzolans and brick powder. The mineralogical composition and pozzolanic potential of the admixtures were determined, as well as the devel-opment of hydraulic phases upon reaction with calcium hydroxide (lime), addingemphasis onthe formation of hydrated cementing compounds. Samples with different percentages of lime and mineral additions were prepared toassesstheir compressive strength, wet erosion resistance and water absorption, and the results were contrastedwith those of their counterparts,stabilized exclusively with lime or cement. The results obtained implythat both the brick powder and poz-zolansusedhave pozzolanic properties andthat, in combination with calcium hydroxide, they form amorphous phases of C-(A)-S-H. However, the use of small amounts of both additions in combination with hydrated air lime in themanufacture of CEBsadversely affected their physical and mechanical properties, compared to CEB samples stabilized only with hy-drated air lime.
