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Phone Number
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+255 755 943 705 / +255 767 307 685
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Email Address
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Mbeya, Tanzania
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P.O Box 1897
+255 755 943 705 / +255 767 307 685
P.O Box 1897
The study stabilized Laterite soils by using Natural pozzolan – Calcium hydroxide binders for the aim of improving its strength. Characterization and stabilization process of Laterite soil under laboratory conditions were conducted. The Laterite soils used for this study were classified as clayey soils with a plasticity index of 33%, a maximum dry density of 1525 kg/m3 and a California bearing ratio of 6.7%. Natural pozzolan – Calcium hydroxide b...
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The characteristic properties of concrete depend on the quality of mortar. In order to improve the properties of hardened concrete, the mortar needs to have good performance. The property of mortar is affected by wet packing density, liquid film thickness, type and quality of binder, gradation of fine aggregates and binder to fine aggregates ratio. The commonly used alkali solutions to produce polymer mortar and concrete is cursed by carbon dioxi...
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The study for determination of dynamic cone penetration index (DCPI) of borrow pit materials for construction of low volume roads was conducted in Dodoma region in Tanzania. Samples for tests were collected from five borrow pits which are Nkulabi, Zuzu, Mahomanyika, Dinda and Ntyuka. Results of plasticity indices were 14%, 11%, 10%, 16% and 13% for Nkulabi, Zuzu, Mahomanyika, Dinda and Ntyuka borrow pits respectively. Results of grading coefficie...
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This study explores the use of PET plastic wastes as a binder for making wall cladding in Tanzania. Traditional wall cladding materials used for construction are marbles, industrial porcelain, steel, glass panels etc. These materials have relatively higher prices for medium and low-income people in Tanzania. Plastic wastes are none degradable when dumped on sites and they contribute to environmental pollution. The use of PET plastics for making w...
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This study explores the use of PET plastic wastes as a binder for making wall cladding in Tanzania. Traditional wall cladding materials used for construction are marbles, industrial porcelain, steel, glass panels etc. These materials have relatively higher prices for medium and low-income people in Tanzania. Plastic wastes are none degradable when dumped on sites and they contribute to environmental pollution. The use of PET plastics for making w...
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The study was conducted to investigate suitability of gravel materials from borrow pits which are used for low volume roads construction in Dodoma Region Tanzania. Characterization of four borrow pits gravel materials from Dinda, Mahomanyika, Nkulabi and Ntyuka were conducted. Blending process of the borrow pits materials with sand from Ihumwa and clay from Michese in order to improve missed engineering properties were conducted. The GC, SP and P...
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The availability of suitable gravel materials for road construction that meet specified standards are becoming scarce and the use of available marginal materials shows challenges of not meeting engineering properties for construction of surfacing layers of Low Volume Roads (LVRs). This study aims at investigating the engineering properties of the mixtures of marginal materials which are natural cinder gravel, natural pozzolana and lateritic soils...
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A bridge is a structure across physical obstacles like valleys, rivers, seas, oceans, lakes, roads and railway. Its components get damaged when exposed to harsh conditions resulting from various causes which reduce its lifetime. Maintenance is necessary to prolong its remaining service life once it gets damaged. Successful maintenance depends on various factors including the availability of funds and the effectiveness of condition assessment and ...
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The study was conducted to investigate variation of CBR values with soaking duration. Four sample materials were used for laboratory tests which are cinder and natural pozzolan from Ituha borrow pit, clay soil from Mlimanyoka borrow pit in Mbeya region and then the three source materials were blended together to obtain a fourth sample materials. Characterizations of soil materials were conducted including maximum dry densities (MDD) and optimum m...
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The use of alkali activated geopolymer binders in the recent years has received much attention because of their outstanding mechanical properties, reduction of CO2 emissions and low energy for production. While number of researches are being done to develop geopolymer binders, their application is still limited. Efflorescence phenomena is one of the limitations of the extensive use of geopolymers. The efflorescence not only affect the materials a...
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Most research focused on the materials’ mechanisms and effectiveness in enhancing AD. However, there is scant information on the biogas and sludge quality and quantity and the kinetics of generated methane (CH4) of biogas from the Fe0-aided AD of domestic wastewater (DW). The information is essential for AD reactors’ management. This study characterizes the sludge and biogas from Fe0-aided AD of DW and predicts the CH4 yield using the Gompertz, L...
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Bridge condition assessment is the process of determining the extent and severity of defects on bridge elements. The defects found are quantified in terms of indices. Several bridge Authorities use bridge indices to plan and prioritize maintenance activities. For this study, the inventory of the bridge elements and defects for four bridges: Kikwete bridge found in Kigoma, Mvomero bridge found in Morogoro, Unkuku bridge found in Dodoma and Nyahua ...
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Alkali activated binder, commonly known as geopolymer cement, has replaced Portland cement in the production of mortar and concrete globally over the past few years. The density, particle size distribution, and specific surface area (SSA) are important physical parameters affecting strength and durability of alkali activated binders. This study carried out tests for physical and chemical properties of the natural pozzolan and calcium hydroxide an...
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Results from different research suggest that metallic iron (Fe0) materials enhance anaerobic digestion (AD) systems to remove organics (chemical oxygen demand (COD)), phosphorus and nitrogen from polluted water. However, the available results are difficult to compare because they are derived from different experimental conditions. This research characterizes the effects of Fe0 type and dosage in AD systems to simultaneously remove COD and nutrien...
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The study to design concrete by using cinder blended aggregates was conducted in Mbeya Region Tanzania.
Cinder aggregates were blended with crushed stones aggregates for concrete mixes. In Mbeya Region there are
abundant volcanic materials which are pozzolan, cinders and pumices. The study involved characterization of
source aggregates and for blended aggregates. The materials used for this study were natural cinder aggregates
from Ituha, Cru...
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