A Foundational Study on Static Mechanical Characteristics of the Super Lightweight and High Strength Material Using Fly-ash

Abstract

In order to reduce the environmental pollutions and develop a new type construction material with super lightweight and high strength, we did some fundamental studies on the mechanical behaviors. The three kinds of experimental samples were made of fly-ash and full hard polyurethane, whose special mix-ratio and producing methods are described in this investigation. The static mechanical characteristics were discovered in the three kinds of material tests, namely the compression test, the bend test, and the cleavage test. The mechanical behaviors of this new material are also compared with that of concrete in the investigation. The main results obtained in the study are : 1) the new material can be made of fly-ash and full hard urethane, 2) stress-strain relations are discovered in the tests, and 3) the new material can be used not only as reinforcement of steel structural system for seismic design, but also as expansion device for highway bridge, due to its large capacities of transformation, remarkable lightweight and high strength.

Bending Fatigue Properities Research of Polyurethane Cement (Puc)

“…The main components of PUC are polyurethane and cement, mixed together [3][4][5][6]. The hardness range of this material is 10-100 (IRHD), and it possesses good chemical resistance, flexibility, adhesion and film-forming properties.…”

“…The availability of many tests and the number of projects demonstrate that the use of polyurethane cement (PUC) materials to strengthen bridge structures is becoming a feasible technique [1][2][3][4][5][6]. PUC material can make the repair or retro-fitting of bridge elements more effective, easier to handle, and cheaper because of its very simple method of implementation and its excellent properties and flexural behaviour [1].…”

Study on the Self-Monitoring of Bending Fatigue Cumulative Damage for Carbon Nanofiber Polyurethane Cement

“…By pouring PUC material at about the thickness of 25 mm onto the bottom of a concrete beam or onto the side of a concrete column, the concrete beam and the column will be subjected to force in coordination with the concrete beam and the column. This reinforcement method is between the external reinforcement method and the increasing section method, but the increased area of the cross-section is small, which has little effect on the structural appearance and the bridge clearance; this consequently has a good reinforcement effect [1][2][3][4]. Compared with traditional reinforcing methods, this method has the advantages of having strong adhesion to the concrete as well as good fluidity, and it is environmentally friendly, light weight, high in toughness, and easy for use in construction, etc.…”

An Experimental Study on Static Mechanical Characteristics of The New Modified Polymer Concrete with High Strength and Super Lightweight Using Special Polyurethane

“…Polyurethane is a high performance polymer elastic material, polyol and the polyisocyanate, is the main components forming the polyurethane segment block, and the ether linkages. [1,2] …”