Energy-Efficient Dry Construction Mixtures Based on Modified Diatomite
Abstract
The article presents data from scientific research work on the development and study of effective dry building mixtures based on modified diatomites. The properties of the mineral filler diatomite were studied, and it was found that its surface becomes more active and has almost 3-4 times higher strength after thermal treatment compared to untreated diatomite reaching 4.28 MPa. It was also established that the optimal addition of low-viscosity cellulose ether (LCE) and redispersible polymer powder (RPP) results in nearly doubling the composite composition's strength and reaching 0.92 MPa. The water retention capacity of the developed compositions was studied using various methods and on different bases, as well as the effect of ambient temperature on this indicator. Thus, with the ratio of lime: diatomite of 1:1, the mixture showed a water retention capacity of 79.6%, a ratio of 1:2 = 80.5%, and a ratio of 1:3 = 88.7%, all three indicators are lower than recommended, according to the regulatory document. With the same ratio of 1:3 and the introduction of special additives LCE + RPP (50:50) in the amount of 0.1%, 0.2% and 0.3%, this value significantly increased to 93%, 96.5% and 96.6%, respectively.