The Use of Sapropel in Development of Effective Thermal Insulating Materials

Abstract

This paper presents investigations of thermal conductivity, tensile strength and compressive stress at 10% deformation of effective thermal insulation composites made from hemp shives and sapropel. Images of hemp shives and hemp composite microstructure obtained by scaning electron microscope (SEM) are analised. The paper presents properties of composite from seven compositions. Composite forming mixture contains different amount of sapropel as well as paper production wastes (PPW) obtained in paper processing industry.

Experimental justification for sapropel and hemp shives use as thermal insulations in Latvia

“…Graphical correlation between compressive strength and density can be seem in Fig.3. If the results are compared to similar studies, then it can be seen that achieved thermal conductivity is adequate for sapropel thermal insulation materials as it is around 0,053 W/m*K [30], [31]. But if compared to other hemp materials, for example, a hemp lime concrete, then it has superior thermal conductivity as hemp-lime materials have it around 0,075 W/m*K [32], although their mass is also larger.…”

The Effect of Organic Lake Sediments (Sapropel) on the Properties and Biological Resistance of Unfired Clay Bricks

“…Also, it was demonstrated that composite materials that were made using hemp shives and SP had exceptional thermal and acoustic properties [18][19][20]. The compressive strength of such composites was 0.61-0.28 MPa, whereas their density was 210-410 kg/m 3 .…”