By Oleg Figovsky
One manner of bettering functionality attributes of establishing buildings is to exploit a brand new category of materials―polymer composites. they've got distinct homes that mix excessive energy with positive aspects of non-metallic fabrics. Polymer concretes (PC) seem to supply many percentages for generating new fabrics with wanted actual and mechanical features, comparable to more suitable mechanical energy, low permeability, and bigger chemical resistance. Advanced Polymer Concretes and Compounds offers the result of theoretical and experimental examine on effective development fabric composites in keeping with complicated polymer binders.
This e-book examines the composition and houses of 2 new polymer concretes that experience capability to unravel numerous building concerns: rubber concrete according to a polybutadiene binder and silicate polymer concrete with an organo-silicate matrix. It examines the actual, mechanical, and technological houses of those computers in addition to their habit in harsh environments and sturdiness and reliability matters. The authors describe a brand new environmentally pleasant polymer for monolithic business flooring coverings and coatings―nonisocyanate polyurethanes. in addition they speak about complex crack-resistant coatings according to water dispersion of chlorosulfonated polyethylene, which are used on concrete, steel, and plastic for numerous business makes use of equivalent to airplane, cars, paint, and in shipbuilding and civil engineering.
The booklet covers a brand new kind of epoxy composition with nano-heterogenic constitution with strength for larger mechanical houses and chemical resistance, acid-resistant construction fabrics in accordance with a nanostructured binder, and a sophisticated environmentally pleasant and weather-resistant fire-protective coating for indoor and outdoors software to flammable substrates. With a spotlight on novel concretes and protecting compounds for various environments, this booklet displays the most recent advancements within the swiftly becoming box of establishing fabrics engineering.
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Extra info for Advanced Polymer Concretes and Compounds
5 MPa. For creation of increased temperatures, special spiral heating elements were placed at the sides of the sample. The level of temperature heating was 60°C–105°C. During the test, loading was done after a steady temperature was attained. Temperature was controlled in a maximum stress zone. 3. The load-carrying capacity values are averaged for test results for various stresses and temperature levels. 10. Each line that converges several isobar families corresponds to the given level of normal stress σ1; σ2; σ3.
The amount of involved sulfur in the system depends on the desired properties of the product. For hard RubCon, this is 47–55 mass parts per 100 mass parts of rubber. The rising of the rate of chemical reactions between sulfur and rubber, acceleration of the vulcanization, and reduction of its temperature are accomplished using special accelerators. The use of a few accelerators may improve the vulcanization process because of their mutual activation. Two accelerators were used: tetramethylthiuram-disulfide (thiuram-D) and CAPTAX®.
Precast PC can be produced quickly, as compared to precast concrete or machined cast iron, has a high strength-to-weight ratio, and can be produced with cast inserts. However, the limited pot life of polymeric binder mix makes it difficult to obtain high-quality large products and structures made from epoxy, polyester, furan, and carbamide polymer concretes. Significant shrinkage of epoxy PC and large deformability of polyester PC lead, in some cases, to defects in the manufacturing and operation of products and structures made of these polymer concretes.
Advanced Polymer Concretes and Compounds by Oleg Figovsky