... can be attributed to differences in finishing effort or timing of finishing, or both. 23 12 2003 02 07 2004 freeze-thaw supplementary cementing materials fly ash slag ASTM C 672 finishing bleed set time References Bouzoubaa , N. , Bilodeau...

...AMO Mohamed; M Hossein; FP Hassani In this study, experiments were performed to evaluate the formation of ettringite in mine tailings samples treated with lime, fly ash type “C,” and aluminum. The success of the treated samples was evaluated based on results of X-ray diffraction and scanning...

...H Wang ASTM C311 is widely used to evaluate the soundness of cement-fly ash blended systems. The soundness test is performed according to ASTM C151—an autoclave test to determine the soundness of portland cement. It has been known that excessive autoclave expansion of cement- fly ash blends occurs...

...K Al-Jabri; R Taha; A Al-Harthy; S Al-Oraimi; A Al-Nuaimi Flowable fill is a self-compacted, cementitious material used primarily as a backfill in lieu of compacted fill. It is generally a mixture of sand, small amount of cement, fly ash, and water. Sand is the major component of most flowable fill...

...R Kumar; VK Kanaujia; A Ranjan This study investigates the feasibility of using two waste materials i.e., Cement kiln dust (CKD) and Fly Ash (FA) together in the construction of highway embankment/road works. In this work, fly ash was stabilized with different proportions of CKD and the potential...

...DS Lane; HC Ozyildirum The effects of portland cement alkali content, and replacement of portland cement with Class F fly ash, slag, or silica fume on alkali-silica reactivity (ASR) were studied by measuring the expansion of mortar bars made with Pyrex glass and stored over water at 38°C...

...MDA Thomas; MH Shehata; SG Shashiprakash Fly ash has been used as a pozzolanic admixture in concrete for more than 50 years. Earlier uses were largely confined to low-calcium ashes from hard bituminous or anthracite coals. However, increased demand for fly ash coupled with the declining...

... of various parameters such as the composition and proportion of the different types of SCMs in concrete (for example, fly ash, slag, silica fume), the total cementitious materials and/or total alkali content in the system, and the reactivity level of the aggregate. Accelerated concrete prism and mortar bar...

...MH Zhang; J Mirza; VM Malhotra This paper describes the materials used, mixture proportions, mixing and shotcreting operation, and properties of the fresh and hardened polypropylene fiber-reinforced shotcrete incorporating silica fume and high volumes of fly ash. The polypropylene fiber-reinforced...

... aggregates and available admixtures in conjunction with AASHTO Test Method T 303, indicated that fly ash and fly ash/lithium admixtures resulted in significant reduction in expansion of mortar bars. The matrix for this research involved five fly ash sources, five aggregate sources, one local cement...

... such as fly ash, slag, silica fume and natural pozzolans have been tested at different replacement levels in combination with various reactive aggregates including siliceous limestone, greywacke, granite and sandstone. Results are presented for 70 different material combinations tested by both the accelerated...

... cement with Class F fly ash; and a Type I/II cement. The aggregate was alkali-silica reactive. The bars were moist cured for seven days after molding at 23°C. Afterward, the bars were subjected to wet-dry, hot-cool cycles over a period of 24 days; one group subjected to a maximum temperature of 55°C...

... to mass concrete. The rate and amount of expansion of cements containing magnesia depend on many factors including the quantity, fineness and calcination temperature of magnesia, cement constituents and strength, presence of mineral admixtures such as fly ash and slag, and storage or service conditions...

...SM Schlorholtz The Materials Analysis and Research Laboratory has been monitoring the soundness of several sources of fly ash since the early 1980's. The soundness tests were generally conducted in accordance with ASTM Test Method C 311 (the autoclave expansion test utilizing 20% fly ash and 80...

...OSB Al-Amoudi; M Maslehuddin; IM Asi This investigation was conducted to evaluate the performance of fly ash cement concrete specimens made by cement replacement levels of 0, 10, 20, 30, and 40% with Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use as a Mineral Admixture...

...R Helmuth Modified Test Methods for Sampling and Testing Fly Ash or Natural Pozzolans for Use as a Mineral Admixture in Portland-Cement Concrete (ASTM C 311) Pozzolanic (Strength) Activity Index tests with five fly ashes and two portland cements were done to compare results with those of standard...

...O Eren; JJ Brooks; T Celik Using Test Method for Time of Setting of Concrete Mixtures Paste by Penetration Resistance (ASTM C 403), Proctor penetration resistance was determined under isothermal curing temperatures ranging from 6 to 80°C for concretes containing up to 50% of fly ash or ground...

...SM Schlorholtz; W Dubberke Since 1989 this laboratory has had good success using X-ray fluorescence (XRF) methods to determine the amount of fly ash that is present in portland cement-fly ash mixtures. The method has been used on mixtures of dry cementitious constituents prior to batching, and also...

... of the individual components. Application of the method in a case history is used for illustration. KEYWORDS: cement, ground-granulated blast-furnace slag, pulverised fuel ash, fly ash, mineral admixture, chemical analysis, hardened concrete, X-ray fluorescence The determination of the cement content of hardened...

..., such as natural pozzolan, fly ash, and granulated blast furnace slag to control heat of hydration development. For this study, blended cements were prepared using an ordinary portland cement clinker, gypsum, and mineral admixtures, previously ground in a laboratory mill. The average fineness employed was 450 m 2...