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Lea's Chemistry of Cement and Concrete by Peter Hewlett

By Peter Hewlett

Lea's Chemistry of Cement and urban bargains with the chemical and actual houses of cements and concretes and their relation to the sensible difficulties that come up in manufacture and use. As such it really is addressed not just to the chemist and people taken with the technological know-how and expertise of silicate fabrics, but in addition to these attracted to using concrete in construction and civil engineering building. a lot recognition is given to the suitability of fabrics, to the stipulations less than which concrete can excel and people the place it may possibly go to pot and to the precautionary or remedial measures that may be adopted.First released in 1935, this is often the fourth version and the 1st to seem because the loss of life of Sir Frederick Lea, the unique writer. Over the lifetime of the 1st 3 variants, this publication has develop into the authority on its topic. The fourth variation is edited by way of Professor Peter C. Hewlett, Director of the British Board of Agrement and vacationing commercial Professor within the division of Civil Engineering on the college of Dundee. Professor Hewlett has introduced jointly a amazing physique of overseas individuals to provide an version that is a necessary successor to the former variations.

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During the twentieth century there has been a four- or five-fold increase in cement strength at 28 days and a corresponding capacity for design concrete strengths to be increased. It is clear that structures built today in concrete would have been impossible with the low-strength cement that was available earlier in the century. The use of concrete, an artificial conglomerate of gravel or broken stone with sand and lime or cement, is also of great antiquity. The term 'concretum' was applied by the Romans only to the finished mass.

New light on the early history of reinforced cement. : 793 5. Idorn GM, Thaulow N. Examination of 136 years old Portland cement concrete. Cement and Concrete Research, 1983; 13(5): 739 43. Blezard RG. A discussion of the reference 72 paper. Cement and Concrete Research 1984; 14(1): 154-6. Idorn GM, Thaulow N. G. Blezard of the reference 72 paper. Cement and Concrete Research 1984; 14(1): 157-8. Rayment DL. The electron microprobe analysis of the C-S-H phase in a 136 year old cement paste. Cement and Concrete Research 1986; 16: 341-4.

The Romans carried their knowledge of the preparation of mortar with them to the remoter parts of their empire, and the Roman brickwork found in England, for example, is equal to the best of that in Italy. Ground tiles were the most commonly used ingredient, but in a few districts deposits bearing some resemblance to the natural pozzolanas of the Bay of Naples were found. The use of Rhenish volcanic tuffs known as Trass ^^ was probably introduced at this time, and this material, like pozzolana, is still employed at the present day.

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