THE EFFECT OF ELECTROPLATING WASTEWATER SLUDGE AS AN ADMIXTURE ON THE PHYSICAL PROPERTIES OF CONCRETE--PHASE I
The feasibility of using sludge as a concrete admixture was investigated. The sludge from two sources only were studied: WHYCO Chromium Company, Inc. Conn. and New England Plating Co. Inc. Mass. The project consisted of testing for physical properties, radiochemical leaching, chemical analysis, x-ray diffraction analysis, and a literature survey. The variation in behavior of compression strength of concrete as a function of sludge content is discussed. The various densely graded WHYCO sludge concretes all experienced relatively similar increases in strength with time. Severe lags in early strength development were not observed. In the case of 25% and 100% sludge concretes, high early strengths were achieved. It is anticipated that 75% WHYCO sludge content concrete has greater strength than the normal two- and four-week concretes. Bar pull-out results for WHYCO and NEP sludge-concretes are also discussed. Zinc, Manganese, nickel and cobalt all leach from concrete in amounts less than 0.02% of their total content in the incorporated sludge. Zinc and manganese are not soluble in leach water whereas 20% to 25% of the cobalt and nickel were found to be soluble. X-ray diffraction and infared data show that the addition of sludge containing heavy metals in Portland cement for the production/of concrete does not affect its capability of hydration and that essentially no significant change occurs during the chemical reactions of setting and curing.
- Sponsored by American Electroplaters' Society.
Manhattan CollegeManhattan College Parkway
Riverdale, NY United States 10471
- Spinna, R J
- Publication Date: 1979-10-20
- Features: Appendices; Figures; References; Tables;
- Pagination: 67 p.
- TRT Terms: Admixtures; Compressive strength; Concrete; Concrete curing; Diffraction; Electroplating; Hydration; Leaching; Manganese; Nickel; Physical properties; Pull out test; Reviews; Sludge (Deposit); Strength of materials; Wastewater; X rays; Zinc
- Uncontrolled Terms: Concrete properties; X-ray diffraction
- Subject Areas: Highways; Materials;
- Accession Number: 00312459
- Record Type: Publication
- Report/Paper Numbers: Proj No. 49
- Files: TRIS
- Created Date: Aug 5 1980 12:00AM