Structure and Properties of Lime-Ash Cement and its Modification

RIAZANOV, A.N.; Vinnichenko, Varvara; NEDOSECO, I.V.; Рязанова, В А; RIAZANOV, A.A.

doi:10.31659/0585-430x-2018-756-1-2-18-22

Cited by 2 publications

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“…In contrast to filling materials made from thick rocks lightweight filling materials have high specific surface and chemical activity. These proportions of the filling materials influence on the process of forming the structure, physic-mechanical, physictechnical and exploitation properties of the concrete [15]. So that the strength of the concrete is composed from the concrete's strength sum and the strength of the addition of these components, i.e zone of the contact, consequently the last factor is very important.…”

Section: Contemporary Problems In Architecture and Construction IImentioning

confidence: 99%

“…In fine-grained concretes the filling can fully cover and become structural element of cement making stone, so that the lime penetrating into the depth of the grain of amorphous volcanic rock enters into chemical reaction synthesizing hydro silicates of types C4AH13, C3AH6, teberomit, C4S5H,CSH(A), C2SH(B), ksonolit, aphlivit. The lime doesn't get strength quickly, as Portland cement and it becomes hard longer and gets strength during centuries, thus newforming is low fundamental hydrosilicates and hydro aluminums which are more long lived [15,16,17,18,19].…”

Section: Contemporary Problems In Architecture and Construction IImentioning

confidence: 99%

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The Use of Lightweight Concrete Effectiveness in Volcanic Resistant Construction

Badalyan

Arakelyan

Karapetyan

2019

KEM

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The article is devoted to the topical problem - to increase seismic resistance of erected buildings in the Republic of Armenia. Armenia is rich in volcanic rocks of glassy structure, which possess sufficient excess free energy of particles of matter and this energy can be regarded as a work stock that they can accomplish, i.e. can be regarded as kinetic energy. One of the most active rocks in the republic is the lithoid pumice of the Jrauber-Lusavan deposit, a spongy material of an acidic composition, the amorphous phase of which reaches up to 98%. We studied this rock for obtaining lightweight structural concrete using energy-saving technology. The amorphous structure of pumice gives the possibility of expensive Portland cement to be replaced in part by a cheaper bonded binder - a fine-grained mixture of quicklime and aluminosilicate rock. Due to the non-stable state of volcanic pumice, which possesses chemical activity, i.e. property to interact with lime, the composition of lightweight concrete, which can be used for the manufacture of blocks, reinforced concrete structures. In studies to regulate and give concrete the necessary properties, a plasticizing additive of the firm Sika Visco Crete 510P and a mineral additive - microsilica were used. Lightweight concrete cement was obtained, where the compressive strength increased to 43.17 MPa in 28-day increments, and 4.1 MPa in the case of bending: and with partial replacement of Portland cement with lime, the strength naturally decreased, because lime is slowly gaining strength, but for a long time, and the strength to break has increased to 4.6 MPa, which is explained by the structure of the neoplasms.

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Section: Contemporary Problems In Architecture and Construction IImentioning

confidence: 99%

Section: Contemporary Problems In Architecture and Construction IImentioning

confidence: 99%

The Use of Lightweight Concrete Effectiveness in Volcanic Resistant Construction

Badalyan

Arakelyan

Karapetyan

2019

KEM

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Cementless concretes, based on anthropogenic wastes of the Irkutsk Oblast

Vabishevich,

Makarenko,

Khokhryakov

et al. 2024

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The accepted global trend of transition from a linear economy to a closed-loop one stimulated the development of regulatory documents, such as “Strategy for the development of building materials in the Russian Federation and Irkutsk Oblast”, Decree of the Government of the Russian Federation dated 08/02/2023 No. 2094, both at federal and regional levels. Further, the Baikal interregional scientific and educational centre was established. All this aims at obtaining technologies for developing effective building materials, based on technogenic wastes, and establishing the production. It is planned to obtain effective building materials, based on the accumulated high-tonnage waste of the Usolye-Sibirskoye priority development area, such as ash and slag mixtures of the combined heat and power plant (90 million tons) and lime-containing waste, generated during the production of acetylene at the Khimprom PJSC (more than nine million tons). The paper represents a fundamentally new approach to obtaining artificially synthesised newgrowths of cementless concrete, based on technogenic wastes, which meets the requirements of regulatory standards in terms of frost and water resistance and allows using this concrete in enclosing structures. At a rationally selected ratio between lime-containing wastes and an ash-slag mixture, subject to the pre-established principles of technological preparation in terms of their mechanical activation, mixing technology, conditions and synthesis duration, it is possible to obtain high-quality cementless concrete that meets the basic requirements of regulatory documents for quality indicators.

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Structure and Properties of Lime-Ash Cement and its Modification

Cited by 2 publications

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The Use of Lightweight Concrete Effectiveness in Volcanic Resistant Construction

The Use of Lightweight Concrete Effectiveness in Volcanic Resistant Construction

Cementless concretes, based on anthropogenic wastes of the Irkutsk Oblast

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