Building Demolition Products as a Secondary Raw Material for High-Strength Concrete

Abstract

The article presents an analysis of the experience of using the products of buildings and structures demolition, the technology of recycling secondary raw materials to produce secondary raw materials for concrete. The results of tests of heavy high-strength concrete (HSC) on the base of filled binders (FB) obtained using the products of processing of concrete broken materials and crushed bricks are given. Using local natural and man-made raw materials, optimal formulations of highly mobile concrete mixes with a grade of P5 cone sediment and persistence of more than 8 hours designed to obtain HSC classes of compressive strength to B60-B80 with unique performance properties. The physical-mechanical characteristics of HSC of local natural and man-made raw materials of classes B30-B80 are studied and the growth in time of their strength characteristics are evaluated depending on the type of binder. The physicalmechanical characteristics of HSC based on natural and mancaused raw classes B30-B80 and held at the time of growth assessment of their strength properties depending on the type of binder. The coefficient of prism strength for concrete of FB is in the range of 0.82-0.86, when for concrete of a traditionally used PC, this indicator is below 0.78.

Роль Тонкомолотого Наполнителя Техногенной Природы В Рецептуре Наполненных Вяжущих Для Высококачественных Бетонов

“…Так, в публикациях авторов [6,7] отражены наполненные составы самоуплотняющихся смесей с применением микронаполнителя различной природы. Авторами работ [8,9,12,13] Следовательно, из всех исследуемых добавок (за исключением дорогостоящего специального стабилизатора Bermocoll) наиболее существенно стабилизирует цементные суспензии МНТП из бетонного лома и ККБ. Эти добавки снижают эффект седиментации частиц даже при сильном разбавлении суспензий жидкой фазой (с В/Ц = 1,6).…”