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    ALTERNATIVE CONSTRUCTION METHODS FOR LOW-COST HOUSING IN SOUTH AFRICA JUSTIN HASELAU Purpose: To compare alternative construction methods for low-cost housing in order to identify the best method regarding cost, time and quality and improve the awareness regarding these methods.

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    Slag also is used commonly to mitigate ASR and typically is used in higher dosages than fly ash, generally 35 to 50 percent (by mass of cement) and in some cases, in even higher dosages. The specific dosage needed to mitigate ASR in a given concrete mixture depends on the reactivity of the aggregate and the total alkali content of the concrete.

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    should be 42,5N or higher because the concrete must develop strength as rapidly as possible. Note that it is illegal to sell common cement in South Africa without a regulatory Letter of Authority (LOA) number which indicates compliance with SANS 50197-1 or EN 197-1. 6.2 Aggregates Sand and stone are used for most block production.

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    List of South African inventions and discoveries

    The following is a list and timeline of innovations as well as inventions and discoveries that involved South African people or South Africa including predecessor states in the history of the formation of South Africa. This list covers innovation and invention in the mechanical, electronic, and industrial fields, as well as medicine, military ...

    Types of Bituminous Materials in Construction

    History of Bituminous Materials. Before the era of bitumen, tar was used as the binder material for bituminous materials. After the 20th century, the new types of vehicles with pneumatic tires came into its existence in the UK. The time was when tar was used in road construction in larger areas.

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    distribution of some of the more widely used radial tyre types in South Africa. The use of wide base (“Super Single”) tyres is limited to approximately 4 per cent in South Africa, but is expected to increase as a result of a recent increase in world trade, as

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    A Concrete Energy Efficiency Solution

    Cement — the key ingredient of concrete — is the world’s most widely used building material. It’s also the product of an energy-intensive process that accounts for about 5% of global greenhouse gases.

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