Impact of modification of sand-lime mass with organic compounds on the microstructure and mechanical features of silicate bricks

Abstract

The aim of conducted research is to modify sand-lime blocks with organic compounds, which in turn leads primarily to increase their strength characteristics and resistant to injury. The liquid admixture of organic compounds, which are rich in certain elements, chemical compounds and macro-, micro-and ultraelements (among others colloidal silica or phosphorus) beneficial effects on a number of chemical transformations in the manufacturing process of this products. The SEM (Scanning Electron Microscope) examination enabled the phase composition analysis of the modified products. Occurring transformations have an impact on the phase microstructure (C-S-H phase is remodeling, C-S-H is Calcium Silicate Hydrates CaO-SiO 2-H 2 O and and calcium silicate hydrates of arranged structure, i.e. tobermorite), the porosity and physical and mechanical properties of the final product, which is a sand-lime block. The research demonstrated that the application of organic compounds to silicate products led to the creation of the following phase known as tobermorite and sometimes xonotlite. Sand-lime products are a group of construction materials used to erect external and internal walls of buildings. Are called an environmentally friendly, because these products consist only of sand, lime and water. The aim of conducted modification, besides improving features of studied material, is to retain its naturalness and therefore used admixtures are also analyzed in order to estimate their influence on the environment and human.

Effects of Bentonite Additives on Autoclaved Sand-Lime Product Properties

“…In a traditional production of autoclaved silicate products, amorphous C-S-H and crystal tobermorite (C5S6H5) are usually synthesis products [17][18][19][20]. According to the literature data, the strength of autoclaved materials depends on the total content of the two mineral phases [21,22].…”

Changing the method of compaction of autoclaved building materials modified by diabase and barite aggregate.

“…It is assumed that such modifications will have beneficial influence over structure and microstructure, determining the properties of final products. Research conducted at PSK can prove that the application of heavy aggregates, among others graphite, basalt and barite can cause the increase of density and strength, and consequently the increase of acoustic insulating properties [11][12][13]. In turn the application of light aggregates(ashoporite) in raw material mixture led to the decrease of the density of finished products and simultaneous improvement of the parameter of thermal insulation.…”

Autoclaved Sand-Lime Products with a Polypropylene Mesh

“…Using basalt aggregate [4], barium sulphate [5,6], lithium silicate [7] or leachate from a landfill [8] has improved properties of sand-lime products. Efforts were also made to reduce bulk density of silicates and improve their thermal insulation properties by using a light additive in the form of expanded glass granules [9,10].…”

“…Using basalt aggregate [4], barium sulphate [5,6], lithium silicate [7] or leachate from a landfill [8] has improved properties of sand-lime products. Efforts were also made to reduce bulk density of silicates and improve their thermal insulation properties by using a light additive in the form of expanded glass granules [9,10].In the era of sustainable development, attempts have been made to dispose of waste materials by using them as a filler in silicate products. Modifying sand-lime bricks with plastics (high impact polystyrene HIPS, and polypropylene and polyethylene PP) in the form of regranulates has improved strength, while lowering absorbability and density of finished products [11,12].…”