Cement News tagged under: Concrete
Concrete, air and aggregates19 December 2014, Published under Cement NewsThe design of a good-quality concrete mix depends on a number of factors: the right balance between cement and water used, avoiding excessive air entrapment and the use of suitable aggregate. A fresh delivery of concrete Most Portland cement production is destined to become a part of concrete, whether ready-mix, precast, sprayed or other type. A typical mix for concrete is shown in Table 1. Concrete contains three essential elements: aggregate (including coarse, fine and sand... |
The strength of recycling23 August 2013, Published under Cement NewsOne of Latin America’s leading cement producers, Argos has been working on a pilot project for the collection, separation, classification and trituration of Construction and Demolition Waste (C&DW). The company has used recycled aggregates to partially replace conventional aggregates in concrete mixtures of different types of strength and settlement. Several lab tests were carried out to determine the effect of using recycled aggregates with results indicating that types of concretes contain... |
Keeping an eye on moisture03 May 2013, Published under Cement NewsIn concrete batching plants the online measurement of moisture in raw materials allows more precise control of the batching process. Scantech International has developed the TBM260, a new system for measuring the moisture content of material in bins, a trial for which was conducted at the Holcim Darra plant in Queensland, Australia. By Steve Louden, Holcim (Australia) Pty & Ken Smith, Scantech International Pty Ltd, Australia. Figure 1: installation of microwave antennae on the throat... |
Stepping towards sustainability16 January 2013, Published under Cement NewsSouth Africa has a strong cement industry that is now remodelled with many new plants and high standards of cement production. Cheap imports, skilled labour shortages and a lack of government funding still frustrate local producers, but research into lower emissions and more sustainable products continues. By Hanlie Turner, Cement & Concrete Institute, South Africa. The thriving metropolis of Cape Town, South Africa The Cement & Concrete Institute (C&CI) has reported YoY growth ... |