USE OF GUM ARABIC (ACACIA SEYAL) AS CONCRETE ADMIXTURE

Sara Abdullatief Ali Satti, Yousif Hummaida Ahmed

Abstract


This study aims at finding alternative indigenous Sudanese material for concrete admixtures that are necessary for casting concrete in hot weather of the Sudan. It investigates Gum Arabic (GA) namely, Acacia Seyal (known locally as Taleh Gum (TG)). The methodology of the study is based on identifying suitable dosages from literature review.
Then the European standards BS EN 934 & BS EN 480 have been used as a paradigm to classify TG functionality as concrete admixture. The effect of TG dosages on concrete properties are investigated with nil or some water reduction compared to a reference concrete mix with water/cement ratio(W/C) of 0.58 and consistence (slump=70±10) mm. The 0.8%TG by cement weight has been found to be the most appropriate dosage with water reduction levels of 11.5% and 7.5% to achieve similar consistence to reference concrete and mortar mixes respectively. Also TG has impaired the concrete compressive strength when used at equal water content of the reference mix. However, upon reducing water, the compressive strength has increased in mixes containing the TG. At 0.8%TG dosage, TG satisfied all criteria set by
BS EN 934-2:2009 for a set accelerating water reducer (SA\WR).

Keywords


Acacia Seyal; gum Arabic as concrete admixture; Natural concrete water reducer

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References


. A. R Menzies, M. E. Osman, A. A Malik & T. C.

Baldwin 1996, A comparison of the

physicochemical and immunological properties of

the plant gum exudates of Acacia senegal (gum

Arabic) and Acacia seyal (gum talha), Food Addit

Contam, vol. 13, no. 8, pp. 991-9.

. A. Abdelgadeer 2008, Studies about gum Arabic in

Sudan, Gum Arabic Board, Khartoum East, Sudan,.

. D. Muller, & C Okoro 2004, Production and

marketing of gum Arabic, Network for Natural

Gums and Resins in Africa (NGARA), Publication

Series 2, Nairobi,.

. N. P. Mailvaganam, 1996, Miscellaneous

Admixtures, In V. S. Ramachandran (ed.), Concrete

Admixtures Handbook, 2nd edn, Elsevier Science,

pp. 939-1024.

. A. M. Salih 2001, Improved concrete by using gum

Arabic, Summary of PhD in technical sciences,

Russia.

. British Standard Institution (BSI) 2006, Admixtures

for concrete, mortar and grout- test methods part

: reference concrete and reference mortar for

testing, London: BSI,BS EN 480– 1.

. British Standard Institution (BSI) 2008, Tests for

mechanical and physical properties of aggregates

Part 5: Determination of the water content by

drying in a ventilated oven, London: BSI, BS EN

-5.

. British Standard Institution (BSI) 2012, Tests for

geometrical properties of aggregates Part 1:

Determination of particle size distribution—sieving

method, London: BSI, BS EN 933-1.

. 9-British Standard Institution (BSI) 2010,

Admixtures for concrete, mortar and grout- test

methods part 8: determination of the conventional

dry material content, London: BSI,BS EN 480-8.

. A. M. Neville & J. J. Brooks 2010, Concrete

technology, 3rd ed., Pearson Prentice Hall, Harlow,

UK,

. 11-British Standard Institution (BSI) 2009, Testing

fresh concrete Part 2: Slump-test, London: BSI, BS

EN 12350-2.

. 12-British Standard Institution (BSI) 2002, Testing

hardened concrete Part 3: Compressive strength of

test specimens, London: BSI,BS EN 12390-3.

. 13-British Standard Institution (BSI) 2009, Testing

fresh concrete Part 7: Air content — Pressure

Methods, London: BSI, BS EN 12350-7.

. 14-British Standard Institution (BSI) 2005,

Methods of testing cement — Part 1: Determination

of strength, London: BSI,BS EN 196-1.

. 15- American Society for Testing & Materials

(ASTM), 1999, Standard Test Method for Flow of

Hydraulic Cement Mortar ASTM C 1437.

. 16- British Standard Institution (BSI) 2006,

Admixtures for concrete, mortar and grout part 2:

Determination of setting time, London: BSI, BS EN

-2.

. 17- British Standard Institution (BSI), 2001,

Admixtures for concrete, mortar and grout part 2:

concrete admixtures- definitions, requirements,

conformity, marking and labelling, London: BSI,

BS EN 934 – 2.

. 18- X. Li, Y. Fang, S. Al-Assaf, G. O. Phillips, K.

Nishinari, & H. Zhang, 2009 Rheological study of

gum Arabic solutions: Interpretation based on

molecular self-association, Food Hydrocolloids,

vol. 23, pp. 2394–2402.


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