The effect of wet slaked lime putty and putty prepared from dry hydrate on the strength of lime mortars

Abstract eng:
It is generally recognized that wet slaking endows the resulting hydrated lime with a colloidal rather than a crystallized character. It is also known empirically that the conversion of dry slaked (hydrated) limes into putties improves their physical characteristics. However, little scientific information can be drawn from the literature, on the effect that wet slaked lime putty and putty prepared from dry hydrate has on the strength of mortars. Two types of lime binder of the same origin, which were subjected to mild (lab research product) and intense (industrial product) calcinations, were studied. These were produced as a wet slaked binder matured for 2 months in both a non-absorbent plastic bin, and in an absorbent wooden bin (with and without sand) and a dry slaked lime converted into putty and soaked for 24h, used immediately after its conversion, or dry mixed directly with sand. Identical lime mortar mixes were then manufactured and studied. The results indicate that the maturation process mainly enhances flexural strength and also improves compressive strength by increasing the strength development rate. In contrast, dry slaked lime gives lower values for flexural strength.

• Export as: BibTeX | MARC | MARCXML | DC | EndNote | NLM | RefWorks
• Add to your basket