Girts Būmanis,
BMF associate professor
“It can be made on site at the construction site using existing concrete screed mixing equipment. The material makes it possible to create seamless floor insulation, it is easy and effective to cover the engineering communications built into the floor, it can be made to the desired thickness.”
Properties can be affected by various factors – mixing, compaction, used binders, etc.
RTU scientists create a new liquid foam composition using only recycled materials in the Latvian Science Council project “Using plaster and polymer-containing construction waste for the production of panels with increased sound absorption and heat insulation properties” (LZP-2020/1–0010). They use a recycled gypsum binder obtained from plasterboard construction waste. The waste is processed and the resulting gypsum powder is burned at a temperature of 145 degrees.
Đirts Būmanis, RTU BMF associate professor. PHOTO: PUBLICITY PHOTO
The developed material has been compared in laboratory conditions with the widely used liquid foam material in construction, which is made with cement binder and is taken directly from the construction site. The scientists determined both the bulk density of the material and performed compressive strength tests and examined thermal parameters to determine heat loss through the material.
Tests confirm that both materials are similar, the material made with gypsum has a slightly higher heat capacity, which means that it is able to accumulate and release more heat, causing smaller temperature changes in the room. The material is also able to effectively absorb sound. The drying properties of the material were also tested.
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Proper drying, as indicated by G. Būmanis is one of the most important prerequisites for safe and effective use of the material. Covering the material too soon can lead to moisture in the structures, which will cause problems in the long term.
Girts Būmanis,
BMF associate professor
“The construction industry, and especially the extraction of raw materials and the production of building materials, is an important source of greenhouse gas emissions. In order to promote Europe’s green transformation and reduce the industry’s negative impact on the environment, it is encouraged to use sustainable building materials and develop a circular economy by recycling waste into new products.”
“Our study proves that a completely recycled material can be obtained by replacing a commercial binder. In order to ensure guaranteed material properties, certified product systems should be chosen as binders,” emphasizes the RTU associate professor.
2024-01-04 09:47:33
#RTU #scientists #developing #thermal #insulation #materials #construction #waste
