Transport Research International Documentation (TRID) https://trid.trb.org/ en-us Copyright © 2024. National Academy of Sciences. All rights reserved. http://blogs.law.harvard.edu/tech/rss tris-trb@nas.edu (Bill McLeod) tris-trb@nas.edu (Bill McLeod) Transport Research International Documentation (TRID) https://trid.trb.org/Images/PageHeader-wTitle.jpg https://trid.trb.org/ Geotechnical Suitability of Soils in Road Construction for Sustainable Development in Tropical Africa: Case of Lateritic Graveled Soils of Bandjoun (West, Cameroon) https://trid.trb.org/View/2319181 Thu, 18 Jan 2024 11:37:27 GMT https://trid.trb.org/View/2319181 Estimation of the introduction risk of non-indigenous species through ship ballast water in the Port of Douala (Cameroon) https://trid.trb.org/View/2305222 Wed, 20 Dec 2023 15:43:03 GMT https://trid.trb.org/View/2305222 Impacts of Mobile Phone Use While Driving on the Performance of Petroleum Product Drivers in Cameroon https://trid.trb.org/View/2166319 Thu, 22 Jun 2023 09:49:11 GMT https://trid.trb.org/View/2166319 Prevalence of alcohol among drivers, riders and pedestrians injured in road traffic crashes in Cameroon: a cross-sectional study https://trid.trb.org/View/2016359 Tue, 11 Oct 2022 11:59:19 GMT https://trid.trb.org/View/2016359 Atmosphere of accidents along the Douala-Yaounde National Road in Cameroon: hoofmarks, drivers, challenges and proactive options https://trid.trb.org/View/2001871 Tue, 02 Aug 2022 14:25:16 GMT https://trid.trb.org/View/2001871 Contribution to the flexible pavement design guides evaluation used in tropical zone: Application to lateritic materials of Bamougoum (West, Cameroon) https://trid.trb.org/View/1942397 Mon, 27 Jun 2022 17:19:56 GMT https://trid.trb.org/View/1942397 Physical and mechanical characterization of pyroclastic materials in Baleng area (Bafoussam, West-Cameroon): implication for use in civil engineering https://trid.trb.org/View/1908514 7%) and therefore a low percentage of fine particles and are suitable for the production of concretes and realization of pavement bases. Based on absolute density (2.53–2.75 t/m3), pyroclastic materials of Takouche are common aggregates of the ungraded sand type and can be used for road construction and concrete works. The sand equivalent (69.0–92.8%) and the absorption coefficient (0.01–0.14%) reveal that these materials are very clean sands and contain poorly accessible pores. However, materials of stratum 2 with a sand equivalent of 69.0% and absorption coefficient of 0.14% allow the formation of concretes, exclusively with the use of Portland cement. The optimal dry density (1.83–2.07 t/m3) and optimal water content (8.0–12.5%) which are Optimum Proctor Modified parameters evidenced that materials from stratum 2 require treatment/correction before their use in road embankments. Meanwhile, materials from the remaining strata and the mixture of strata can be directly used and need to be improved only as base layer for heavy traffics T4 and T5. Referring to the 95% CBR values which range from 25 to 98, materials of stratum 1 and the mixed strata can be used as base layers for T3 traffic. In the mean-time, materials from stratum 3 and stratum 4 can be used as base layers for roads with a low volume of traffic. Nevertheless, materials from stratum 2 with a 95% CBR value of 25 need to be improved before their use as base layer. Moreover, the particle size distribution curves of materials extracted from stratum 1 to stratum 4, and the mixture of all strata do not belong to any particle size grading of sand for concrete. This study suggests proposals with the aim to improve the quality of the studied materials for their better use as concrete sand and backfill material. The correction involves the addition of fine volcanic ash to the pyroclastic rocks collected near the Takouche quarry. The resulting gains in compressive strength of concrete are quite considerable and vary from 52.87% to 97.23%, compared to the strength of concrete usually formulated by local users. The CBR coefficient after correction increases significantly with the maximum value of 115. Finally, the corrected aggregates provide good characteristics for their better use in road construction and concrete formulation.]]> Mon, 25 Apr 2022 10:07:34 GMT https://trid.trb.org/View/1908514 Logistics innovation and knowledge transfer in Cameroon https://trid.trb.org/View/1918753 Thu, 24 Feb 2022 11:09:10 GMT https://trid.trb.org/View/1918753 Infrastructure and Structural Change in the Lake Chad Region https://trid.trb.org/View/1905610 Tue, 15 Feb 2022 09:48:52 GMT https://trid.trb.org/View/1905610 Re-Use in Road Construction of a Karal-Type Clay-Rich Soil from North Cameroon After a Lime/Cement Mixed Treatment Using Two Different Limes https://trid.trb.org/View/1866602 Fri, 03 Sep 2021 15:07:08 GMT https://trid.trb.org/View/1866602 An in-depth analysis of the causes of road accidents in developing countries: case study of Douala-Dschang Highway in Cameroon https://trid.trb.org/View/1876243 Thu, 02 Sep 2021 14:25:34 GMT https://trid.trb.org/View/1876243 Roadside surveys of drinking and driving in Cameroon https://trid.trb.org/View/1857986 Fri, 23 Jul 2021 17:35:16 GMT https://trid.trb.org/View/1857986 Decarbonising gate operations through clean energy solutions https://trid.trb.org/View/1841175 Tue, 25 May 2021 16:20:02 GMT https://trid.trb.org/View/1841175 Landlocking Factors of the North Cameroonian Agricultural Basins and Strategies of Actors https://trid.trb.org/View/1743985 Wed, 03 Feb 2021 15:00:48 GMT https://trid.trb.org/View/1743985 Prevalence of crashes and associated factors among commercial motorcycle riders in Bamenda, Cameroon https://trid.trb.org/View/1760309 Mon, 11 Jan 2021 11:08:04 GMT https://trid.trb.org/View/1760309