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Information × Registration Number 0306U001153, 0105U001335 , R & D reports Title Establishment of physical and chemical bases of creation of energy saving technologies of alkaline Portland cements, whih are high-filled by additives of artificial, natural and man-caused origins popup.stage_title Вивчення процесів структуроутворення та фазового складу лужного портландцементу в залежності від вмісту та виду мікронаповнювачів - золи винесення, природного базальту та відходів базальтового виробництва для отримання в'яжучих з заданими фізико-механічними та експлуатаційними характеристиками Head Krivenko Pavlo Vasilyovich, Registration Date 07-02-2006 Organization Kiev National University of bildiny and tecture popup.description2 The processes of structurization of alkaline portlandcement depending on the contents (60-95% by mass) and a type of microfillers (fly and hydroremoval ashes, slag, natural pearlite, natural and man-caused basalt) with use of solutions of alkalicontaining components with 1,02... 1,20 g/cub.cm for making of binders with the predetermined physical-mechanical characteristics (compression strength (7 day) not lower than 20 MPa, in 28 day - not lower than 40 MPa, setting time - not earlier than 45 min) were investigated. Influence of additives of tamols in presence of alkalicontaining components on the for setting time of the filled cements was investigated. It is determined, that the most influencing for setting time in the investigated systems at useing of not silicate salts (carbonates or sulfates) are lignosulphonates, and in systems which contain silicate salts - the additive "Relaksol". Thus the specified additives at the content of 1 % from substance of binder carry out also a role of plasticizer and allow to considerably increase the mechanical characteristics of cements. It is shown, that at using as additives of portlandcement clinker of ashes, slag and perlite, and as tamol R351-LSP (1 %) together with solutions of soda and potash (1,02... 1,15 g/cub.cm) it is possible to make a compositions with the strength in 7 day 21...52 MPa and 42,8...75,0 MPa in 28 day. The amount of alkalis in such binders makes by R2O 0,34...4,16 %. The interrelation between physical-mechanical characteristics and structurization of alkaline portlandcements which include ashes, slag and pearlite was established. It is determined, that as against of traditional binders (DSTU-2.7-46-96), the phase structure of hydrated newformations at early stages of hardening (1-28 day) is characterized by full absence of Ca hydrate, highbasic hydrosilicates of calcium and presence mainly of lowbasic hydrosilicates of calcium. The used during researches method concerning the directed formation of composite structure of alkaline basaltcontaining binders, due to introduction of plasticizer together with alkalicontaining component allows to make highfilled cements with activity in 28 day 40-60 MPa, contents of clinker component within the limits of 5-40 % and additional components as alkaline compounds and plasticizers in limits 2-5 % in compliance with DSTU-2.7-46-96. Thus, as against the traditional filled cements, the developed systems allow to make cements without decreasing of mechanical characteristics at early age (strengthin 7 day -20 MPa). Research of interrelation of processes of hydration and hardening of binders in systems "portlandcement clinker - slag - basalt - alkalicontaining component - tamol" with synthesis of structure and strength of an artificial stone shows, that at the presence of the considered compounds of alkaline metals, Na2СО3, К2СО3, Na2SO4, K2SO4, processes of structurization of an artificial stone passed in a direction of synthesis basically of hydrosilicate connections of calcium, hydrogarnetic phases and zeolite-like formations. It is marked, that both cation and anion components of alkalicontaining component have influence on a degree of hydration of mineral phases, formation of phase structure and mechanical characteristics of an artificial stone. Thus strength of an artificial stone, a degree of hydration of a basalt component and formation lowbasical hydrosilicate compounds and zeolite-like phases in structure of binders, increases in a number of change of a type of cation and anion in direction K2SO4-Na2SO4-K2СО3-Na2СО3. Product Description popup.authors popup.nrat_date 2020-04-02 Close