Abstract
This research investigated the possibility of using material with different share as an addition to prepare autoclaved bricks. Modifiers are searched, thanks to which the obtained materials will indicate potential suitability of modified products for exposure to activity of moisture and highly loaded building elements, e.g. basement walls. As the modifier was used: highly-efficient chemical agent of polymer, silicate and lithium compounds. The amount of water necessary to thicken the mixture was replaced by a modifier. Introduction of modifier in the form of chemical agent into lime-sand mixture causes the increase of the compressive strength by more than 4 MPa in relation to the reference sample, using 1% of additive. In each analyzed case it reduces the water absorption of finished products. The results of compressive strength and water absorption show different values after 21 days and 24 months from the autoclaving process, the longer the time from the moment of production of products, the better result. Regardless of the amount of applied modifier, the distribution of pores is presented in similar way, the number of macropores was noted at level of around 70%.
Highlights
Request for new materials has contributed to the identification of research and their implementation for common production, which gives completely new opportunities for designers
Additives in the form of recycled plastics have significant influence over the properties of obtained lime-sand products, which are dependent on the type of polymer, the form of recycling and the amount of polymer in the sample.The most favourable parameters were obtained with 20% of HIPS regranulation, 30% of HIPS regranulation and 20% of PP + PE regranulation and their compressive strength in comparison to reference sample increased respectively by 160%, 70% and 48 % and water absorption decreased respectively by: 33%, 93% and 49% [14]
Research of the water absorption of the obtained materials proves that the chemical agent influences the improvement of water absorption of finished lime-sand products, according to the assumption
Summary
Request for new materials has contributed to the identification of research and their implementation for common production, which gives completely new opportunities for designers. Additives in the form of recycled plastics have significant influence over the properties of obtained lime-sand products, which are dependent on the type of polymer, the form of recycling and the amount of polymer in the sample.The most favourable parameters were obtained with 20% of HIPS regranulation, 30% of HIPS regranulation and 20% of PP + PE regranulation and their compressive strength in comparison to reference sample increased respectively by 160%, 70% and 48 % and water absorption decreased respectively by: 33%, 93% and 49% [14]. The basic cognitive objective of the research, being the ground of this articles is the evaluation of the possibility of the application of chemical agent additive for obtaining autoclaved lime-sand materials with favourable physical properties.
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