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Strip Road
A strip road is a dirt road with two narrow, parallel strips of asphalt, one for each wheel. Roads of this kind are found in parts of southern Africa, particularly Zimbabwe. When two cars on a strip road approach each other from opposite directions, each is expected to move away from the centre of the road and use only one strip until the other car has passed. Asphalt strip roads were built in Southern Rhodesia, as Zimbabwe was then known, from 1933 onwards as a relatively inexpensive way of opening up the country for development. Asphalt was chosen after an early experiment with concrete strip roads proved too costly. By 1938, strip roads covered a total distance of 1,890 kilometres, including an unbroken stretch linking the capital, Salisbury (today called Harare), with the southern border town of Beitbridge. By 1945 the total exceeded 3,300 kilometres. After World War II, many of the strip roads were replaced with full-width asphalt roads but some remain, particularly in more ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dirt Road
A dirt road or track is a type of unpaved road not paved with asphalt, concrete, brick, or stone; made from the native material of the land surface through which it passes, known to highway engineers as subgrade material. Dirt roads are suitable for vehicles; a narrower path for pedestrians, animals, and possibly small vehicles would be called a dirt track—the distinction is not well-defined. Unpaved roads with a harder surface made by the addition of material such as gravel and aggregate (stones), might be referred to as dirt roads in common usage but are distinguished as improved roads by highway engineers. (Improved unpaved roads include gravel roads, laterite roads, murram roads and macadamized roads.) Compared to a gravel road, a dirt road is not usually graded regularly to produce an enhanced camber to encourage rainwater to drain off the road, and drainage ditches at the sides may be absent. They are unlikely to have embankments through low-lying areas. This lea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asphalt
Asphalt, also known as bitumen (, ), is a sticky, black, highly viscous liquid or semi-solid form of petroleum. It may be found in natural deposits or may be a refined product, and is classed as a pitch. Before the 20th century, the term asphaltum was also used. Full text at Internet Archive (archive.org) The word is derived from the Ancient Greek ἄσφαλτος ''ásphaltos''. The largest natural deposit of asphalt in the world, estimated to contain 10 million tons, is the Pitch Lake located in La Brea in southwest Trinidad (Antilles island located on the northeastern coast of Venezuela), within the Siparia Regional Corporation. The primary use (70%) of asphalt is in Road surface, road construction, where it is used as the glue or binder mixed with construction aggregate, aggregate particles to create asphalt concrete. Its other main uses are for bituminous waterproofing products, including production of roofing felt and for sealing flat roofs. In material sciences an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zimbabwe
Zimbabwe (), officially the Republic of Zimbabwe, is a landlocked country located in Southeast Africa, between the Zambezi and Limpopo Rivers, bordered by South Africa to the south, Botswana to the south-west, Zambia to the north, and Mozambique to the east. The capital and largest city is Harare. The second largest city is Bulawayo. A country of roughly 15 million people, Zimbabwe has 16 official languages, with English, Shona language, Shona, and Northern Ndebele language, Ndebele the most common. Beginning in the 9th century, during its late Iron Age, the Bantu peoples, Bantu people (who would become the ethnic Shona people, Shona) built the city-state of Great Zimbabwe which became one of the major African trade centres by the 11th century, controlling the gold, ivory and copper trades with the Swahili coast, which were connected to Arab and Indian states. By the mid 15th century, the city-state had been abandoned. From there, the Kingdom of Zimbabwe was established, fol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southern Rhodesia
Southern Rhodesia was a landlocked self-governing British Crown colony in southern Africa, established in 1923 and consisting of British South Africa Company (BSAC) territories lying south of the Zambezi River. The region was informally known as south Zambesia until annexed by Britain at the behest of Cecil Rhodes's British South Africa Company, for whom the colony was named. The bounding territories were Bechuanaland (Botswana), Northern Rhodesia (Zambia), Moçambique (Mozambique), and the Transvaal Republic (for two brief periods instead the British Transvaal Colony, from 1910 the Union of South Africa, and then from 1961 the Republic of South Africa). This southern region, known for its extensive gold reserves, was first purchased by the BSAC's Pioneer Column on the strength of a Mineral Concession extracted from its Matabele overlord, Lobengula, and various majority Mashona vassal chiefs in 1890. Though parts of the territory were laid claim to by the Bechuana and Po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Concrete
Concrete is a composite material composed of fine and coarse aggregate bonded together with a fluid cement (cement paste) that hardens (cures) over time. Concrete is the second-most-used substance in the world after water, and is the most widely used building material. Its usage worldwide, ton for ton, is twice that of steel, wood, plastics, and aluminum combined. Globally, the ready-mix concrete industry, the largest segment of the concrete market, is projected to exceed $600 billion in revenue by 2025. This widespread use results in a number of environmental impacts. Most notably, the production process for cement produces large volumes of greenhouse gas emissions, leading to net 8% of global emissions. Other environmental concerns include widespread illegal sand mining, impacts on the surrounding environment such as increased surface runoff or urban heat island effect, and potential public health implications from toxic ingredients. Significant research and development is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harare
Harare (; formerly Salisbury ) is the capital and most populous city of Zimbabwe. The city proper has an area of 940 km2 (371 mi2) and a population of 2.12 million in the 2012 census and an estimated 3.12 million in its metropolitan area in 2019. Situated in north-eastern Zimbabwe in the country's Mashonaland region, Harare is a metropolitan province, which also incorporates the municipalities of Chitungwiza and Epworth. The city sits on a plateau at an elevation of above sea level and its climate falls into the subtropical highland category. The city was founded in 1890 by the Pioneer Column, a small military force of the British South Africa Company, and named Fort Salisbury after the UK Prime Minister Lord Salisbury. Company administrators demarcated the city and ran it until Southern Rhodesia achieved responsible government in 1923. Salisbury was thereafter the seat of the Southern Rhodesian (later Rhodesian) government and, between 1953 and 1963, th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beitbridge
Beitbridge is a border town in the province of Matabeleland South, Zimbabwe. The name also refers to the border post and bridge spanning the Limpopo River, which forms the political border between South Africa and Zimbabwe. The border on the South African side of the river is also named Beitbridge. Background The town lies just north of the Limpopo River about 1 km from the Alfred Beit Road Bridge which spans the Limpopo between South Africa and Zimbabwe. The main roads are the A6 highway to Bulawayo and the Victoria Falls, being and away respectively and the A4 to Masvingo and Harare. According to the 2012 population census, the town had a population of 41,767 dominated by the Venda and Ndebele people . There is a sizable percentage of Shona people from other provinces this is a busy border post with traders from all over Zimbabwe. The Beitbridge border post is the busiest road border post in Southern Africa, and is best avoided during busy border-crossing seasons. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing military alliances: the Allies and the Axis powers. World War II was a total war that directly involved more than 100 million personnel from more than 30 countries. The major participants in the war threw their entire economic, industrial, and scientific capabilities behind the war effort, blurring the distinction between civilian and military resources. Aircraft played a major role in the conflict, enabling the strategic bombing of population centres and deploying the only two nuclear weapons ever used in war. World War II was by far the deadliest conflict in human history; it resulted in 70 to 85 million fatalities, mostly among civilians. Tens of millions died due to genocides (including the Holocaust), starvation, ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zambia
Zambia (), officially the Republic of Zambia, is a landlocked country at the crossroads of Central Africa, Central, Southern Africa, Southern and East Africa, although it is typically referred to as being in Southern Africa at its most central point. Its neighbours are the Democratic Republic of the Congo to the north, Tanzania to the northeast, Malawi to the east, Mozambique to the southeast, Zimbabwe and Botswana to the south, Namibia to the southwest, and Angola to the west. The capital city of Zambia is Lusaka, located in the south-central part of Zambia. The nation's population of around 19.5 million is concentrated mainly around Lusaka in the south and the Copperbelt Province to the north, the core economic hubs of the country. Originally inhabited by Khoisan peoples, the region was affected by the Bantu expansion of the thirteenth century. Following the arrival of European exploration of Africa, European explorers in the eighteenth century, the British colonised the r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
