Repository logo
  • English
  • Català
  • ÄŒeÅ¡tina
  • Deutsch
  • Español
  • Français
  • Gàidhlig
  • Italiano
  • LatvieÅ¡u
  • Magyar
  • Nederlands
  • Polski
  • Português
  • Português do Brasil
  • Srpski (lat)
  • Suomi
  • Svenska
  • Türkçe
  • Tiếng Việt
  • Log In
    New user? Click here to register. Have you forgotten your password?
Repository logo
    Communities & Collections
    All of DSpace
  • English
  • Català
  • ÄŒeÅ¡tina
  • Deutsch
  • Español
  • Français
  • Gàidhlig
  • Italiano
  • LatvieÅ¡u
  • Magyar
  • Nederlands
  • Polski
  • Português
  • Português do Brasil
  • Srpski (lat)
  • Suomi
  • Svenska
  • Türkçe
  • Tiếng Việt
  • Log In
    New user? Click here to register. Have you forgotten your password?
  1. Home
  2. Browse by Author

Browsing by Author "Mboya, Hieronimi Alphonce"

Now showing 1 - 1 of 1
Results Per Page
Sort Options
  • No Thumbnail Available
    Item
    Feasibility of lightweight aggregate concrete for structural and non-structural works in Tanzania
    (University of Dar es Salaam, 2012) Mboya, Hieronimi Alphonce
    Extensive exploitation of granite aggregates in areas where there are natural lightweight aggregates from volcanic actions have caused serious geological and land degradation in Tanzania. Many Engineers have resorted to using normal weight aggregates in construction because of the feeling that lightweight aggregates (LWA) are too weak for that purpose and for lack of understanding of the design procedures for lightweight aggregate concrete (LWAC). Structures constructed by normal weight aggregates have higher dead loads which demand reduced span lengths, deeper structural members, more reinforcement and increased foundation area when compared to those made from LWA. In Tanzania there are major deposits of LWA in Mbeya, Kilimanjaro and Arusha Regions which remain unexploited. Research was done to investigate the feasibility of using scoria and pumice aggregates in structural concrete. Scoria and pumice aggregates were obtained from Kilimanjaro and Mbeya Regions respectively. A mix design was carried out for both aggregates and it was found out that, it was possible to produce grade 25 concrete with scoria but the concrete made of pumice from Mbeya failed to reach the target strength of grade 20 concrete because the aggregates were too weak. The strength reached was less than 17 MPa, which is the minimum strength for structural LWAC. It was concluded that the use of scoria aggregates for structural concrete was feasible and that the pumice could be used for non-structural LWAC. Further research is needed to find alternative deposits of pumice with better strengths as the strength vary from place to place. Structural and Construction Engineers should be encouraged to use LWA especially in the areas where these deposits are present in order to reduce the cost of transport of normal weight aggregates from longer distances and also to protect the environment.

About Library

The University of Dar es Salaam Library is a vital source of scholarly information that facilitates users to get access to learning and research resources during their studies. It provides access to a wide range of resources in both print and digital formats and conducive reading environment for users, regardless of their physical conditions. All registered users are eligible to access library resources and can borrow print materials from general shelves for a specific period of time.

Useful Links

Koha Staff Login

University Research Repository

WebMail

Aris

Book Study Room

Mara Oral History

Hansard

SOCIAL MEDIA

Instagram

Facebook

Twitter

YouTube

WhatsApp

Ask Librarian

Contact Us

Postal Address
P.O.Box 35092
Dar es Salaam

Call Us: +255 22 2410500/9 Ext. 2165 ; Direct line +255 22 2410241

Fax No:: +255 22 2410241

Email:: directorlibrary@udsm.ac.tz

2025 University of Dar es Salaam - University Of Dar Es Salaam Library
Term of use / Privacy Policy