| Popis: |
Disposal of textile waste, which remains in the production of textiles, contributes to the accumulation of this growing type of waste. One of the possible ways to use waste and recycled textiles is as reinforcement of building materials, especially cement-based composites. In non-aggressive environmental conditions, the compressive strength of concrete is correlated with the durability of the structure but in aggressive environmental conditions such an assumption may be wrong. The ingress of liquids and gases from the environment is directly or indirectly responsible for deterioration of concrete. Suitable methods to measure or predict the potential durability of a concrete used in this research are: the water sorptivity test, gas permeability, water permeability and abrasion resistance. This paper investigates durability properties of three concretes: control mixture and two concretes with cotton knitted fabric waste (CKFW). Small pieces of CKFW were added in concrete in amounts of 1.7 and 3.5% of total volume. All mixes were prepared with the same amount of cement, water, silica fume and superplasticizer. The temperature, workability and air content of the mixtures were tested in the fresh state. Compressive strength was tested on 28-day specimens as well as all durability indicators listed above. Although in this research concretes’ compressive strengths range from 52.8 to 58.7 MPa, other durability parameters limit the use of these concretes. The addition of recycled textile waste improved the quality of the control mixture for some measured durability indicators. |
