Whole Building Design Guide Federal Green Construction Guide for Specifiers 03 30 00 (03300) - 1 http://fedgreenspecs.wbdg.org 01/04/2010 Cast-In-Place Concrete This is a guidance document with sample specification language intended to be inserted into project specifications on this subject as appropriate to the agency's environmental goals. Certain provisions, where indicated, are required for U.S. federal agency projects. Sample specification language is numbered to clearly distinguish it from advisory or discussion material. Each sample is preceded by identification of the typical location in a specification section where it would appear using the SectionFormat TM of the Construction Specifications Institute; the six digit section number cited is per CSI Masterformat TM 2004 and the five digit section number cited parenthetically is per CSI Masterformat TM 1995. SECTION 03 30 00 (SECTION 03300) - CAST-IN-PLACE CONCRETE SPECIFIER NOTE: resource management: Improper mining of raw materials (aggregate and components of portland cement: limestone, oxides of calcium silicon, clay, shale, and sand) can produce soil erosion, pollutant runoff, and habitat loss. Materials for concrete and cement manufacture (aggregates, portland cement, supplementary cementitious materials, and water) are found throughout the US, allowing for minimal shipping distances, yet localized depletion of these resources may occur. Supplementary cementitious materials consist of natural pozzolans and recycled products from other industries. Natural pozzolans include: diatomaceous earths, volcanic ash, and pumicites. Recycled supplementary cementitious content materials for pozzolanic concrete include: fly ash, slag cement, and silica fume. Recycled concrete can also be used in concrete or as a subbase material. Many cement manufacturing facilities are reducing their CO2 emissions through energy efficiency improvements and through increased use of waste lime (instead of converting limestone to lime), and scrap tires. Resource efficient options for permanent formwork include earth forms and insulated, panels or blocks made from expanded polystyrene (beads or extruded), known as insulated concrete forms. Temporary forms (metal pan forms, wood forms, and corrugated paper forms) are generally reusable and easily recyclable. Most typically contain recycled content. toxicity/IEQ: The production of portland cement generates significant volumes of CO 2 , a significant greenhouse gas.. By volume, a concrete mix typically consists of 10 to 15 percent portland cement or other cementitious material. Some facilities have reduced their CO 2 emissions through energy efficiency improvements and through increased use of waste lime (instead of converting limestone to lime). Approximately 50 percent of the kilns in North America use hazardous waste as fuel. Wastes such as spent solvents, printing inks, paint residues, and cleaning fluids often are designated as hazardous because they are flammable and have high fuel values. These materials can be burned to destruction as fuel in a cement kiln at temperatures of about 2700 F (1480 C) while reducing the need to use fossil fuels. There is controversy over the burning of waste materials (tires, MSW, and hazardous materials) in cement kilns. The EPA and the Cement Kiln Recycling Coalition are addressing citizen concerns. Concrete is relatively inert once cured. Admixtures, curing compounds, and sealers may emit VOCs, especially during the curing process; however, virtually all emissions are eliminated before enclosing the building. Hazardous materials may also be "encapsulated" by being mixed with or imbedded in nonporous, durable concrete, commonly known as solidification and stabilization. However, it is necessary to consider future disassembly and possible options for recycling concrete that has "encapsulated" hazardous materials. performance: Performance in place is comparable for green methods and standard methods. Concrete construction provides thermal mass, fire resistance, and durable construction. The thermal mass effect has been proven to reduce heating and cooling loads in most climates. Concrete structures can be designed to last in excess of 100 years which will result in lower repair and reconstruction resources. The coefficient of reflectivity of concrete allows reduced need for lighting and subsequent electricity when used
SECTION 03 30 00 (SECTION 03300) - CAST-IN-PLACE CONCRETE
Apr 26, 2023
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