From raw material to product

Such is the wide range we are covering in our latest issue of ZKG.

Dynamic flow tests can be used to characterize the flow properties of Portland cements (from page 26). Improving the flowability of cement helps lower the risk of inacceptable process performance – important for an industry committed to the highest efficiency.

The paper “Investigations into the influence of chemical activators and templates on cement hydration” (from page 32) addresses the strength of hydrated cement and its cohesive properties. These are determined to a great extent by the structure of the calcium silicate hydrate phases.

The article “Mechanics of the grinding media in ball mills with longitudinal and transverse motion of the grinding media” analyses the problems of perfecting grinding equipment for large-scale production. An improved design of a ball mill, equipped with internal energy exchange devices, is considered, and a description is given of the technical and economic indicators of a standard and an improved mill (from page 38).

The article “Modern engineering of equipment for the cement industry” (from page 46) presents an engineering process that significantly reduces the effort required for computational optimization and thus enables integration into day-to-day business if required.

Two papers concern product application: “Skin and crust formation at mortar surfaces – mechanisms and influencing factors” shows that cementitious mortar layers have a high surface-volume ratio and their evolution is influenced by intrinsic formulation parameters and extrinsic environmental parameters (from page 50). In “Shrinkage of eco-friendly concretes made with limestone-rich cements”, it is shown that the drying shrinkage of cement paste and concrete with a high limestone content depends strongly on the amount and the chemical-mineralogical properties of limestone (from page 60).

Anett Fischer


Related articles:

Issue 2018-11 US 2018/0230057 A1

White cementitious compositions

(22) 11.04.2018 (43) 16.08.2018 (57) A cementitious composition includes (i) white Portland cement having a fineness of about 350-550 m2/kg, D90 between about 11-50 ?m, and total combined iron oxide,...

Issue 2020-9 WO 2020/089048 A1

Admixture for a cementitious material to influence the rheology properties of the cementitious material

(22) 25.10.2019 (43) 07.05.2020 (57) The invention relates to an admixture for a cementitious material suitable to influence the rheological properties of the cementitious material. The admixture...

Issue 2017-7-8 WO 2017/072571 A1

Method of producing a cement composition

(22) 17.10.2016 (43) 04.05.2017 (57) A method of producing a cement composition, which comprises Portland cement and at least one added component, comprising the steps of : – storing Portland cement...

Issue 2015-6 WO 2015/037594 A1

Method for producing Portland cement­ clinker

(22) 03.09.2014 (43) 19.03.2015 (57) In this method for producing a Portland cement clinker, the proportion of silico-manganese slag used in a starting-material mixture is set so as to be 2-10 mass%....

Issue 2019-3 US 10 167 420 B1

Loss circulation compositions (LCM) having Portland cement clinker

(22) 19.10.2017 (45) 01.01.2019 (57) Portland cement clinker LCMs that include Portland cement clinker to mitigate or prevent lost circulation in a well are provided. A Portland cement clinker LCM may...