Shi Bing Sun

Recycled CRT Funnel Glass as Coarse Aggregate and Fine Aggregate in the Radiation Protection Concrete

In recent decades, high-tech electrical equipment has drastically proliferated instead of Cathode Ray Tube (CRT), making CRT funnel glass potential hazardous solid waste. Due to a relatively high level of lead, CRT funnel glass could be used as a potential material for the production of anti-radioactive concrete. In our study the CRT funnel glass , which was separated as aggregate in the concrete, was reduced to 4.75-25 mm (coarse aggregates) and less 4.75 mm (fine aggregates) in the production of anti-radioactive concrete. Mixes containing 0%, 20%, 40% , 60%, 80% and 100% (volume percentage) of CRT funnel glass to replace fine aggregate and coarse aggregate (respectively or simultaneously)) were prepared. The influence of the size, shape and replacement percentage of aggregates on workability, compressive strength and radiation shielding performance were determined. It was found that the replacement of natural aggregate with recycled CRT glass considerably improved the slump and radiation shielding performance but reduced compressive strength. The optimum percentage of waste funnel glass used as fine aggregate and coarse aggregate was 40%. The results clearly showed that the CRT funnel glass performed a significant enhancement in radiation shielding properties.

Study on the Critical Control of Foam Insulation Materials Produced by Waste TFT-LCD Glass

The present work studied the critical control of foam insulation materials produced by waste TFT-LCD glass. The result showed that foam glass was affected by sintering temperature, as well as other factors such as foaming agent, oxygen supply agent and reaction time. The ordinary waste glass was used to drop the melting temperature of Waste TFT-LCD glass. The density of foam glass had a down-up trend with the increase of sintering temperature. The increase of ratio of foaming agent and oxygen supply agent led to a notable decrease of the density, while the change of reaction time exerted an unobvious influence on the density. The density of foam glass produced under the optimal conditions was 0.2211 g/cm3.

Generation Review on the Production Line Development of Foam Glass at Home and Abroad

According to domestic and international history of foam glass, the foam glass development situation of the United States, France, Japan, the former Soviet Union and China was specifically introduced. Moreover ,the foam-glass-production-lines history was divided by generations and the production-lines characteristics each generation was presented in detail. Compared with the production scale ,investments and unit production cost of foam glass production line on different generations ,we could find that building high-generation production lines, increasing productivity, improving quality, reducing costs and enhancing competitiveness will be the development trend of foam glass industry in the future.

A Study of Effect Factors on Sodium Silicate Based Expanded Perlite Insulation Board Strength

Because of low strength, the expanded perlite insulation boards application in building energy saving is restricted. This paper discuss change rules of the expanded perlite insulation board apparent density and mechanical strength with adjusting the amount of sodium silicate, pressing pressure, heating system. It turned out that good thermal insulation performance and high strength expansion perlite insulation board is prepared by mass ratio of 2.5:1 of 30% of the content of solid sodium silicate solution to expanded perlite, 0.38MPa of pressing pressure and 105°C condition of heating temperature.

High Temperature Resistance Effect of SrO/(SrO+CaO) in Alkali-Free Boro-Aluminosilicate Glasses

This paper studied the change regulation of the electrical resistivity of alkali-free boro-aluminosilicate glasses with the rate of SrO/(CaO + SrO) in the range 600~1600°C.The results showed that a mixed alkaline effect was observed with the increase of SrO content in alkali-free aluminoborosilcate glasses: the maximam resistivity of 178Ωcm appeared at SrO/(CaO+SrO) ratio =0.24, which is much larger than 108Ωcm at SrO=0. Meanwhile, the experiment results showed that the SrO makes stronger influence on the resistivity of the glass than CaO does. The Arrhenius plots, which showed the change of the resistivity with temperature in range of 1100~1625°C, present nonlinear variation, and an inflection at about 1100°C. It proved that the electrical resistivity of the alkali-free aluminoborosilcate glasses were controlled by the ionic radius of alkaline earth metals and the viscosity of glass melts.

The Effect of Re-Dispersible Polymer Powders on Cement-Based Self-Leveling Mortar

The current paper experimentally investigated the effect of different kinds re-dispersible polymer powers (RPP) on cement-based self-leveling mortars. The construction operation of mortar and its mechanical property was tested in accordance with the standard JC/T 981-2005. Besides, the micro-structure surface of self-leveling mortar was characterized by means of SEM to reflect the microscopic mechanism of the performance. The results showed the dispersible polymer powders could significantly improve performance of fluidity, adhesion property and abrasion resistance on cement-based self-leveling mortar; Meanwhile, there is no bad impact on its compressive strength and flexural strength. This study has guiding significance for the construction and application of cement based self-leveling mortar.

The Effect of Waterproof Processing Method on Properties of Calcium Silicate Board

In this paper, the effect of waterproof processing method on properties of calcium silicate board was studied in view of the requirement of calcium silicate board for building external wall. Experiments adopted waterborne epoxy resin in the test to do waterproof processing by three ways, which means taking the measure of waterproof processing respectively on two surfaces of the sample, on two surfaces and two lateral faces of the sample, and on all the six surfaces of the sample. The results showed that the sample could easily get wet from the side to the center, and it could only get satisfactory results when taking waterproof processing on all the six surfaces of the sample. Meanwhile, the water absorption rate of the sample decreased from 18.4% to 4.4% and its bending strength significantly got improved even after that the sample was treated separately by freeze-thaw cycles, dry-wet circulation, and soaking in hot water. Moreover, the performance of moisture deformation of the sample got reduced.

Effect of Anhydrite on Cement-Based Self-Leveling Mortar

In this paper, the effect of anhydrite on the cement-based self-leveling mortar performance was studied. The construction operation of mortar and its mechanical property testing were based on the standard JC/T 981-2005. The results showed that the anhydrite played a significant role on the performance of compressive strength and flexural strength. Furthermore, the best performance of dimensional change rate, abrasion resistance and adhesive strength was obtained with 8% anhydrite content. This study has guiding significance for the construction and application of cement-based self-leveling mortar.

Effect of EVA Emulsion on the Properties of Corn Stalk Magnesium Oxychloride Cement Composites

By the method of EVA emulsion coating, cron stalk-magnesium oxychloride cement composites (C-MOC) was modified to study the effect of EVA emulsion content on C-MOC density, the coefficient of thermal conductivity, water resistance and mechanical properties. Furthermore microstructure of C-MOC was analyzed by SEM. The results show that: with the increase of EVA emulsion content, the coefficient of thermal conductivity and softening of C-MOC increase, but water absorption reduces. When the content is 80%, the flexural strength after 28 days could reach 3.65 MPa and the compressive strength is 4.69 MPa, reaching the maximum. At the same time, C-MOC density is 816 kg/m3 and thermal conductivity is 0.111 W/(m·k). Water absorption is 36% and softening coefficient was 0.47. It is believed that EVA emulsion could form a thin film on the outer surface of the corn stalk by microscopic analysis, increasing the roughness of the straw surface and reducing the gap between the stalk. Since the EVA emulsion has good compatibility with the magnesium oxychloride cement, they could constitute a whole jointly with glue liquid, crystal and fiber, playing the role of enhancing the surface. Therefore, water resistance, thermal conductivity and mechanical properties of C-MOC have been improved effectively.

The Influence of Bi2O3 on SiO2-Al2O3-B2O3-RO Glass Propertiesarts

In the paper, regarded SiO2-Al2O3-B2O3-RO system as basic composition, high-temperature glass glaze was prepared successfully by using Bi2O3 in place of Al2O3, and traditional melt annealing method was adopted .The influence of Bi2O3 on expansion coefficient, sintering temperature, electrical resistivity was investigated by DIL-2008, SJY sintering imager, Keythley2410. The results show that the sintering temperature of glass glaze has a wide range, which can reach 270°C, so it is easy to sinter; with the increasing of bismuth oxide content, expansion coefficient of glass glaze gradually increases, whereas sintering temperature and electrical resistivity continuously decreases.