Properties of cement with the low Portland clinker and the different content of silica fly ash as well as granulated blast furnace slag

Abstract

The paper presents a study to determine the applicability of blended cements with low Portland clinker content in construction mortars, including special mortars. The main additives used in the study, in the form of ground granulated blast furnace slag and silica fly ash, were characterised by a similar grain composition of less than 40 μm. They were introduced into mortars as a replacement for Portland cement in amounts of 50 and 70 % and their mixtures in amounts not exceeding 70 %. Tests were carried out to determine the influence of the proportion, as well as the SiO2 and CaO content of the individual main components, on the strength parameters of the designed cements. The results show that these cements can be used in self-compacting concrete technology and in sealing mixtures for geoengineering applications, which are designed to perform soil reinforcement and sealing. The proposed technology for the production of CEM V and CEM VI cements, in addition to the favourable changes in their properties, results in a significant reduction in the energy required to produce these cements.

Residue after the extraction of potassium and chlorine from by-pass dust as a new raw material for the synthesis of low-emission Portland clinker

“…An important role in reducing CO 2 emissions is the use of alternative [secondary] fuels in the cement industry, mainly for the production of Portland clinker. An alternative fuel is properly sorted and processed waste containing combustible parts (6,(14)(15)(16)(17)(18).…”

“…An alternative fuel can also be a single waste from a long list of waste, e.g., used car tires (6,(14)(15)(16)(17)(18).…”

Physico-Mechanical Properties and Hydration Processes of Cement Pastes Modified with Pumice, Trass and Waste Chalcedonite Powder

“…Different actions are constantly taken to limit this phenomenon. The most important suggestions for solutions to reduce carbon dioxide emissions in the cement industry worldwide are [1][2][3][4][5][6][7][8][9][10][11][12]:…”

“…Cement production is responsible for about 5% of global carbon dioxide emissions [ 3 , 4 ]. Greenhouse gas emissions such as NO x , SO 2 , CO and CO 2 are a serious problem worldwide [ 1 , 3 , 4 , 5 , 6 ]. Different actions are constantly taken to limit this phenomenon.…”

“…Different actions are constantly taken to limit this phenomenon. The most important suggestions for solutions to reduce carbon dioxide emissions in the cement industry worldwide are [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ]: The replacement of Portland clinker with other materials (pozzolanic and waste materials), resulting in a new type of Portland cement with additions—compositions with two– or three–ingredient binders; The popularization of multi-component and low–clinker cements; The efficient use of raw materials and alternative fuels (e.g., biomass); The popularization of energy-saving technologies (e.g., belite, sulfoaluminate). …”