Advanced Materials Research Vols. 712-715

Abstract: Construction industry develops with the increase of energy consumption, and there are enormous impacts on the environment during the process of its design construction and use. However, the environment is the conditions for the survival of mankind and the basis of sustainable development of human society. This paper explores the ways to architecture design under the concept of low-carbon economy.

Abstract: This paper elaborated eco-building-materials and life cycle assessment, proposed to follow in the eco-design philosophy of the construction, and focuses on the basic approach of building materials eco, including the ecology of the traditional building materials and high-tech research and development of eco-building materials. It pointed out the urgency and importance of the development of eco-building-materials.

Abstract: Government supervision in construction engineering quality (security) is the government enforcement supervision, whose seriousness; legality and authority are on basis of an orderly supervision procedure. We should ensure the standardization of implementation plan for supervision early days and strengthen the standardization of implementation process in mid-term, even control the standardization of implementation results later period. To sum up, it includes handling supervision procedures strictly, choosing supervisory personnel scientifically, defining supervision scheme reasonably, informing supervision parts definitely, listening to the subject reports seriously, choosing selective examination project randomly, implementing site inspection, uploading supervision records timely, issuing treatment notice directly, completing supervision report form etc. To standard surveillance behavior via scientific and reasonable supervision procedure, it could improve the validity of monitoring and high efficiency, and achieve the scientific nature and purpose of government supervision procedure in construction engineering quality (security).

Abstract: In the paper, the effects of the foaming temperature and holding time on the quality of the foam glass were investigated by means of the different foaming technology. The results indicated that lots of the defects, such as the non-uniform size of the bubbles, big hole and the pit at the bottom, were caused by the high foaming temperature. The fine pore structure was formed by the low temperature. The molding and properties of the foaming glass was affected by the length of the heat preservation time. The rate of acceptability and the mechanical property of the foam glass can be effectively improved by the optimized foaming technology.

Abstract: In recent years, with the rapid development of the complex building structures, the lack of collaborative work platform for the information exchange between different disciplines results in the phenomenon of information gap and information isolated island. Realizing such a demand, a software was developed for supporting information transformation from IFC-format data model to structural model. In this paper, A case study was implemented to illustrate the method of structural model transformation, The results show that the software can extract the information of IFC structural model and form a corresponding structural model.

Abstract: Properties of alkali-activated slag cements compounded with soluble glasse with a high silicate modulus Ms=2.6 were detailedly studied in this paper, including compressive strength and flexure strength characterictics at the ages of 3,7,28 days and flow values of fresh cement mixtures on a jolting table. As a result, with the compressive strength at the age of 28 days of 95.6-107.8 MPa has been developed, and the flow values and strength characteristics of alkali-activated slag cement mortars increased with increase in a water to cement (alkaline activator solution to slag) ratio, and the flow value (determined on the cement mortar mixtures) would reach 145 mm. Moreover, the development speed of strength characteristics of mortar specimens would be affected negatively by increasing of water demand (requirement).

Abstract: The explosion process of masonry wall under interior explosive load was simulated by adopting the fluid-solid coupling method basing on the software ANSYS/LS-DYNA. The Von Mises stress nephograms and the contrast analysis of the numerical simulation results and test results were presented. The research indicates that mortar elements fails earlier than brick, a little difference exists between the sizes of the blasting hole in X and Y direction because of the transmission of blast wave in brick masonry, the size of blasting hole grows with the increase of weight of charge, and with the increasing charge, the rate of change declined gradually.

Abstract: The construction waste was processed into recycled aggregate to produce paving brick with grade of Cc40. The influences of raw material ratio on the compressive strength of construction waste paving brick were studied with orthogonal analysis method. The results show that the optimum raw material ratio are as follows: mass ratio of recycled aggregate to cement is 3.0, water cement ratio 0.30, compound activator 1.1% (mass fraction of cement, the same below), interfacial agent 0.6%, and water reducing agent of 0.5%. In addition, mechanisms of the admixtures were further studied by SEM and EDS.

Abstract: Construction garbage paving bricks were made of recycled coarse and fine aggregates which were prepared by the waste concrete. The influence of replacement rate of recycled coarse aggregates, water-binder ratio and excitation agent dosage on the compressive strength and flexural strength of construction garbage paving bricks were researched. The experimental results show that optimum replacement rate of recycled coarse aggregates, water-binder ratio and excitation agent dosage were 100%, 0.43 and 1.5% respectively. In this proportion, the 7d, 28d compressive strength of the products were 15.6MPa, 37.5MPa respectively, and the 7d, 28d flexural strength were 2.0MPa, 4.3MPa respectively, which fit the requirements of the Cc30 level of compressive strength and the C_f4.0 level of flexural strength involved in JCT 446-2000 "concrete pavers".

Abstract: The present paper analyzes the feasibility of using septic tank sludge subsequently treated in an anaerobic pond as raw material in the ceramic industry. An experiment was conducted involving the manufacture of 500 bricks using 6.5% (dry weight) of sludge at a ceramic plant in the Northeast of Brazil. To reproduce the methodologies, the same conditions and methods used by the local ceramic industry were adopted. To evaluate the bricks produced and environmental risk, compressive strength, water absorption and lixiviation tests were carried out, obeying current Brazilian norms, according to international standards. Results show the technical feasibility of using sludge as raw material in the red ceramic industry, highlighting the firing temperature of the bricks as a determinant variable. Moisture content of the sludge-clay mixture emerges as limiting factor in the manufacturing process. The moisture value determined as acceptable in the study was 22%.