Sintered fly ash lightweight aggregate - its properties and performance in structural concrete
By: Ojha, P. N
.
Contributor(s): Singh, Brijesh.
Publisher: Thane ACC LTD 2021Edition: Vol.95(6), March.Description: 20-30p.Subject(s): Civil EngineeringOnline resources: Click here
In:
Indian Concrete Journal - ICJSummary: The paper presents study conducted on sintered fly ash coarse aggregate produced indigenously. The sintered fly ash coarse aggregate [Low Density Aggregate (LDA) / Lightweight Aggregate (LWA)] is lower in density in comparison to normal weight aggregate. In the current study, class F fly ash has been used. The two fractions of sintered fly ash coarse aggregates (8-16 mm and 4-8 mm) were evaluated. Experimental programme evaluated the micro-structural, physical and chemical properties of sintered fly ash coarse aggregates for its suitability in making concrete for masonry units, hollow and solid lightweight concrete blocks, and structural lightweight concrete (SLC) for non-wearing surfaces. The paper also presents the experimental study on suitability of sintered fly ash lightweight aggregate in structural concrete. Concrete with sintered fly ash aggregate has been made at two watercement ratios (0.55 and 0.45). The various mechanical properties such as compressive strength, flexural strength, split tensile strength, drying shrinkage, modulus of elasticity, and Poisson’s ratio have been determined. The durability properties has also been investigated conducting rapid chloride ion penetration test (RCPT), electrical resistivity, chloride migration test, water permeability, and sorptivity (absorption) index. The mechanical and durability properties of LWAC have been compared with corresponding test results of normal weight aggregate concrete (NWAC) at same water-cement ratio of 0.55 and 0.45. The finding of the study has been useful for formulation of a new Indian Standard for production of structural lightweight concrete (SLC) using sintered fly ash lightweight coarse aggregate.
| Item type | Current location | Call number | Status | Date due | Barcode | Item holds |
|---|---|---|---|---|---|---|
Articles Abstract Database
|
School of Engineering & Technology (PG) Archieval Section | Not for loan | 2021-2022092 |
The paper presents study conducted on sintered fly ash coarse aggregate produced indigenously. The sintered fly ash coarse aggregate [Low Density Aggregate (LDA) / Lightweight Aggregate (LWA)] is lower in density in comparison to normal weight aggregate. In the current study, class F fly ash has been used. The two fractions of sintered fly ash coarse aggregates (8-16 mm and 4-8 mm) were evaluated. Experimental programme evaluated the micro-structural, physical and chemical properties of sintered fly ash coarse aggregates for its suitability in making concrete for masonry units, hollow and solid lightweight concrete blocks, and structural lightweight concrete (SLC) for non-wearing surfaces. The paper also presents the experimental study on suitability of sintered fly ash lightweight aggregate in structural concrete. Concrete with sintered fly ash aggregate has been made at two watercement ratios (0.55 and 0.45). The various mechanical properties such as compressive strength, flexural strength, split tensile strength, drying shrinkage, modulus of elasticity, and Poisson’s ratio have been determined. The durability properties has also been investigated conducting rapid chloride ion penetration test (RCPT), electrical resistivity, chloride migration test, water permeability, and sorptivity (absorption) index. The mechanical and durability properties of LWAC have been compared with corresponding test results of normal weight aggregate concrete (NWAC) at same water-cement ratio of 0.55 and 0.45. The finding of the study has been useful for formulation of a new Indian Standard for production of structural lightweight concrete (SLC) using sintered fly ash lightweight coarse aggregate.
Click on an image to view it in the image viewer
There are no comments for this item.