Factorial Design for Experimental Planning of Sludge Waste Incorporated Cement Pavements

Abstract

Cement pavement block are worldwide used to cover streets as an alternative to petroleum-base asphalt. These blocks are required to be not only strong but also dense and impact resistant. Packing of the precursor materials is an important factor in the final properties. In principal, this could be improved by the incorporation of another stable powder material like a local cost mineral residue or waste. The objective of this work is to investigate the effect of addition of a powder waste on the composition of a cement pavement block by means of an experimental planning. This planning was associated with a factorial design modeling based on composition variables including sand, gravel and the waste as well as the water/cement ratio. The response surfaces were evaluated and optimum proportion variables defined for best combination of properties.

Technical Feasibility of Using Lightweight Concrete with Expanded Polystyrene in Civil Construction

“…The materials used in this investigation were purchased in the local market and all tests were conducted at the Laboratory of Civil Engineering (LECIV) of the State University of the Northern Rio de Janeiro (UENF), Campos dos Goytacazes, Brazil. The cement and sand had their characteristics presented elsewhere [5]. The EPS beads were obtained from disaggregated pieces of commercial Styrofoam ® .…”

Evaluation of a Tacking Stage for Adherence, between Mortar and Ceramic Brick

“…However, both the norm [5] and technical publications [6][7][8][9][10][11][12], regarding the cement curing time in civil construction, fail to discuss the temperature and humidity in the working ground. By taking these factors into consideration, the objective of the present work was to evaluate the need and relevance of tacking as a procedure to improve the adherence between the mortar and a brick masonry.…”