13-02-2015· Due to the high water absorption capacity, the expanded shale lightweight aggregates were pre-soaked for a minimum of 72 h. The saturated surface dry expanded shale aggregates were mixed for 5 min with 75 % of the mixing water then added to the cementitious materials and mixed for an additional minute.
Lightweight Self-consolidating Concrete with Expanded Shale Aggregates: Modelling and Optimization By Abdurrahmaan Lotfy, Khandaker M. A. Hossain and Mohamed Lachemi Get PDF (2 )
01-06-2021· The SFRELC was made of cement, sintering expanded shale, lightweight sand, milling steel fiber, polycarboxylic acid super-plasticizer and tap-water [14,15]. The ordinary silicate cement was grade 42.5 with the water requirement of normal consistency of 27.4 %, the compressive strength of 51.7 MPa and flexural strength of 9.2 MPa at 28 days.
Keywords: expanded shale aggregates, lightweight self-consolidating concrete, multi-objective optimization, water to binder ratio, high range water reducing admixture, total binder content ...
An improved lightweight cementitious product made up of an aqueous cementious mixture using cement and expanded shale, clay and slate mix, that can incorporate fly ash, lime, and the weight saving component, which is micronized polystyrene particles having particle sizes in the range of 50 to 2000 microns, and characterized by having water contents in the range of from about 0.5% to 50% v/v.
expanded-shale lightweight concrete (SFRELC) can be applied as a structural material. One of these attempts is applying SFRELC to the prefabricated structural members in tensile zone under loadings. It was verified that the cracking resistance and loading capacity of beams under static and fatigue
EXPANDED SHALE - A LIGHTWEIGHT CONCRETE AGGREGATE BLAEHSCHIEFER - EIN LEICHTBETONZUSCHLAG. Under laboratory conditions a valuable expanded shale lightweight concrete aggregate can be obtained from various shales of the Styrian Graywacke Zone.
Lightweight concrete, also known as EPScrete (expanded polystyrene concrete), is a material widely used in the building of environmentally "green" homes. The substance is often made using small Styro balls as a lightweight aggregate instead of the crushed stone that is used in regular concrete.
07-08-2021· Today, these expanded shales and clays are marketed under many brand names. They have given construction workers high grade aggregates ranging in weight from 40 to 60 pounds per cubic foot. When properly used, they produce dry concretes weighting form 90 to 100 pounds per cubic foot, as compared with 140 to 150 pounds per cubic foot for concretes made with most natural aggregates.
Expanded Shale, Clay, and Slate Lightweight Aggregate (UN CPC 3756 and 1532) This product group includes expanded shale, clay, and slate lightweight aggregate in all applications but primarily in masonry, concrete, asphalt pavement, lightweight geotechnical fills, …
Concrete Masonry Physical Properties of Expanded Shale, Clay & Slate Lightweight Aggregate And Lightweight Concrete Masonry Units April 2007 Expanded Shale, Clay & Slate Institute (ESCSI) 2225 E. Murray Holladay Rd, Suite 102 Salt Lake City, Utah 84117 (801) 272-7070 Fax: (801) 272-3377 [email protected]
01-01-2017· Using pre-wetted expanded clay aggregate with similar mix composition, concrete density was 1900 kg/m 3 with a compressive strength up to 70.2 MPa. Although having similar mechanical properties as the waste plastic aggregate, pre-wetted expanded clay allows better cement hydration process, resulting in lower water absorption of lightweight ...
22-08-2020· Expanded shale is sedimentary rock (shale), that has been heated at high temperatures—often up to 2,000° Fahrenheit, which causes the shale to expand. The heat chemically alters the makeup of the rock resulting in a lighter, more porous structure. Expanded shale was traditionally used in building materials to lighten concrete structures.
Recently, expanded shale aggregates of the kind used to produce lightweight concrete have been used as a substitute for ordinary fill materials in geotechnical applications where the combination of low unit weight and substantial shear strength is important.
Arcosa Lightweight is the largest producer of rotary kiln expanded shale and clay lightweight aggregate in North America, and is uniquely situated to supply expanded shale and clay lightweight aggregate to markets in most of the 48 contiguous states. Concrete construction products and a variety of other industries rely heavily on the supply of Arcosa expanded shale & clay lightweight aggregate.
PRODUCTION . STALITE's strong end-use products begin with the production processing of our raw material slate. Slate possesses the high strength and lasting durability necessary to create a superior lightweight aggregate. Unlike shale or clay deposits formed from mineral or organic sediments, the slate used in STALITE was formed from volcanic ash. This volcanic ejecta, free of impurities which ...
For the popularized structural application, steel fiber-reinforced expanded-shale lightweight concrete (SFRELC) with high freeze-thaw resistance was developed. The experimental study of this paper figured out the effects of air-entraining content, volume fraction of steel fibers, and fine aggregate type. Results showed that while the less change of mass loss rate was taken place for SFRELC ...
To expand the structural application of steel fiber reinforced expanded-shale lightweight concrete (SFRELC), a self-compacting SFRELC with high-workability was developed based on previous research. As part of the investigation, the present study focuses on the adaptability of formulas used for the complete stress–strain curves of steel fiber reinforced lightweight-aggregate concrete and ...
ID1315: Lightweight Masonry Grout made with Expanded Shale. TANNER, ALLISON1; FONSECA, FERNANDO S.2. 1) Graduate Student, Brigham Young University, Civil & Environmental Engineering Department, [email protected]. Lightweight aggregate has been used successfully for structural and non-structural applications, and its most common use has ...
All concrete mixtures were prepared in 35 batches in a drum rotating mixer. Due to the high water absorption capacity, the expanded shale lightweight aggregates were pre-soaked for a minimum of 72 h. The saturated surface dry expanded shale aggregates were mixed for 5 min with 75 % of the mixing water then added to the cementitious materials
Concrete made with expanded vermiculite aggregate weighs from 35 to 75 pounds per cubic foot. Concrete made with expanded shale and clay is about as strong as ordinary concrete, but its insulation value is about four times better.