MAIN CHARACTERISTICS OF GRANULATED PHOSPHORUS SLAG (GPS) USED FOR BINDING MATERIALS MANUFACTURING

Обзорный анализ теоретических и экспериментальных известных работ показал, что ГФШ, полученный при охлаждении водой расплава с температурой 1450°С, является пористым материалом со средней плотностью 1200 кг/м3. Состоит он из трех фаз:стекло в количестве 90 - 95 %, минералы (достигает 10 %) и вредные газы (0,3 - 4 %). Благодаря повышенной гидравлической активности - ГФШ может быть использован в качестве минеральной добавки для портландцемента, одного из компонентов для шлакопортландцемента и основного компонента для шлакощелочных вяжущих с марочностью М500 и М1000 соответственно. Одновременно существуют нормативные документы, разрешающие получать вяжущие материалы без очистки и неразрешающие, если ГФШ не очищено от вредных газов. Анализ показывает необходимость применения ГФШ только в очищенном виде. The review analysis of theoretical and experimental known works showed that GPS obtained by water cooling of the melt with temperature 1450°C is a porous material with average density of 1200 kg/m3. It consists of three phases: glass in quantity 90 - 95 %, minerals (reaches 10 %) and harmful gases (0,3 - 4 %). Thanks to the increased hydraulic activity - GPS can be used as a mineral additive for Portland cement, one of the components for Portland cement slag and the basic component for slag-alkali binders with the stamps of M500 and M1000 respectively. At the same time there are normative documents allowing to receive binders without purification and unauthorized, if GPS is not purified from harmful gases. The analysis shows the necessity to use GPS only in purified form.

Influence of Aggregate and Binder Content on the Properties of Pervious Concrete

This study introduces the experiment based on following parameters: kind of aggregate (natural river gravel and air-cooled blast furnace slag), the aggregate gradation and content of binder. Main properties such as compressive strength, void content and hydraulic conductivity of pervious concrete were investigated in the experiment. The experiment showed satisfactory results in the case of pervious concrete made of natural aggregate. Results of pervious concrete made of air-cooled blast furnace slag aggregates are perspective, however needs for some optimizations. Results confirmed the opposite relationship between compressive strength and void content/hydraulic activity. ACBFS performs worse than NA as for compressive strength, while it performs better in the case of hydraulic conductivity and void content.

Synthesis of Special Clinkers with the Use of Technogenic Raw Materials

During research were developed ideas about the formation of C6A4MS phase in the aluminate clinker. The influence of the mineral and chemical composition of the raw mixture on the formation of C6A4MS was studied. Schemes of phase transformations providing synthesis of C6A4MS are proposed in this paper. Within research also have been studied the processes of hydration and hardening of aluminate phases. It was found that C6A4MS exhibits high hydraulic activity. Preference is given for the content of C6A4MS in aluminate clinkers obtained using technogenic materials.

Mortars prepared with mechanochemical treated asbestos-containing waste

The paper presents the results of recycling of asbestos-containing waste (ACW). It is shown that hydraulic activity of ACW is increased using mechanochemical treatment in the vibratory ball mill in presence of anionic surfactant. Experimental results show that substitution of 10% w.t. of cement on activated asbestos-containing waste leads to increasing of the compressive strength to 20%. Finally, the effect of the activated ACW on the hardening kinetics of mortars is examined.