By H. F. W., Taylor
H F W Taylor was once for a few years Professor of Inorganic Chemistry at he college of Aberdeen, Scotland. for the reason that 1948, his major learn curiosity has been the chemistry of cement. His early paintings laid the rules of our knowing of the constitution on the nanometre point of C-S-H, the primary product shaped whilst cement is blended with water, and the only almost always reponsible for its hardening. next reviews took him into many extra elements of the chemistry and fabrics technological know-how of cement and urban. His paintings has been well-known through Fellowships and via different honours and awards.
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Extra resources for Cement Chemistry, second edition
Its structure is similar to that of sodalite (Na4(Al3Si3Oi2)Cl); the constitutional formula is Ca 4 (Al 6 O 12 )O (P3). 5 The CaO-AI2O3-SiO2 system The phase diagram was originally determined by Rankin and Wright (R4). 3 is based on that of Muan and Osborn (M26), with further amendments mainly following from studies on the bounding CaO-SiO 2 and CaO-Al 2 O 3 systems discussed in the preceding sections. It relates to atmospheric pressure in an atmosphere of normal humidity, the primary phase field of Ci 2 A 7 thus being shown.
3 Structural modifications of clinker aluminates Production clinkers have been found to contain cubic or orthorhombic forms of aluminate, alone or in combination. The monoclinic modification has not been observed. The orthorhombic modification is also known as the prismatic, dark interstitial material, and is sometimes pseudotetragonal. It can arise only if sufficient alkali is available, but its formation appears to be favoured also by rapid cooling and by bulk compositions potentially able to yield a relatively high proportion of aluminate (Ml8).
2 is thus approximate in this region. For practical purposes, the situation in air of ordinary humidities is more important than that in very dry and oxygen-free atmospheres, and the primary phase field of Q 2 A 7 will be included in the relevant ternary and quaternary phase diagrams presented below. Ci 2 A 7 or Ci 2 A 7 H has been found as a natural mineral and named mayenite (G7,H13). 4 C5A3, C2A and C4A3 The conditions of formation of C5A3 are discussed in the preceding section; it is probably an equilibrium phase in the strictly binary system CaO-Al 2 O 3 but does not form in atmospheres of normal humidity and oxygen content.
Cement Chemistry, second edition by H. F. W., Taylor