Assessment of Engineering Properties of Al-Haweri Scoria, NW Sana’a, Yemen

Yıl 2020, Cilt: 44 Sayı: 2, 117 - 130, 15.12.2020

Ibrahim A. Al-akhaly Abubaker A. Al-sakkaf

https://doi.org/10.24232/jmd.826975

Cited By: 1

Öz

Assessment of Engineering Properties of Al-Haweri Scoria, NW Sana’a, Yemen

Öz

Yemen has an appreciable amount of scoria aggregate, but a very small proportion is used as cement additions
by local cement factories in blended Portland cement production and very rarely as aggregates into the production
of lightweight blocks. Scoria aggregates are widespread in and around the volcanic cones present in Sana’a-Amran
volcanic field. This paper presents the results of evaluation of engineering properties of natural scoria, collected from
Al-Haweri volcanic cone, NW Sana’a, Yemen as lightweight aggregate. Chemical composition and petrographical
characteristics of scoria were determined. The physical properties of the scoria aggregate such as flakiness and
elongation indices, specific gravity, water absorption, unit weight, clay lumps and materials finer than 75μm gave
acceptable results, but the gradation indicated it would need to be processed before use in a mix. The porosity is
high, 60.79%. The Los Angeles abrasion and the aggregate crushing values are higher than the limits of ASTM and
BS specification, but the aggregate impact value is close to the upper limits of BS specification. The soundness is
within the ASTM specification limits. Therefore, it can be concluded that scoria aggregates can be used to produce
structural concrete and masonry blocks with a relatively low density. The scoria aggregates satisfied the requirements
of lightweight aggregate for structural concrete and masonry blocks purposes.

Anahtar Kelimeler

Al-Haweri,, Light weight aggregate, scoria aggregate

Kaynakça

• ACI, 2000. Use of Raw or Processed Natural Pozzolans in Concrete, ACI Committee 232, Manual of Concrete Pratice ACI 232.1.