Low-firing binders from magnesium containing carbonate raw materials

Nikolay, Shelikhov; Рахимов, Р З; Сагдиев, Р Р

doi:10.1134/s0020168516110169

Cited by 3 publications

(1 citation statement)

References 4 publications

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“…Самые мелкие поры с диаметром менее 0,2 мкм присутствуют в очень хорошо увлажненной зрелой матрице романцемента. Более крупные поры с диаметром около 1 мкм характерны для растворов, сильно подверженных воздействию воздуха, в которых процесс гидратации был прерван испарением воды [17].…”

Section: результаты и обсуждениеunclassified

Roman Concrete: The Material of Construction Heritage

Sagdiyev,

Belov

2023

build

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Statement of the problem. Many cultural heritage buildings of 17th–18th centuries in Russia and abroad require reconstruction not by modern systems such as ventilated facade or “wet facade”, but by authentic materials based on roman concrete. The authenticity lies in its unique structure, which is obtained after the drying of the plaster composition based on roman concrete. This material has a number of advantages: it permits the movement of steam and moisture, allowing the façade to breathe and preventing the growth of fungi and mold; it is lighter than plaster mixes based on Portland cement; and the texture is aesthetically pleasing. Compositions based on roman concrete have demonstrated their applicability in facade reconstruction, since it perfectly retains the old plaster, increasing service life. The purpose of this article is to give an overview of the production and use of roman concrete in the 17th and 18th centuries for finishing facades and stucco. Our task is to review and analyze the advantages and disadvantages of roman concrete and the experience of its production and use, and justify the prospects of researching and improving its composition and properties. Results. We define the necessary performance properties of roman concrete for the reconstruction and resto-ration of facades. Conclusions. Roman concrete is one of the few materials with a composition and structure compatible with architectural monuments that is suitable for restoration.

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Section: результаты и обсуждениеunclassified

Roman Concrete: The Material of Construction Heritage

Sagdiyev,

Belov

2023

build

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Carbonate Phase in the Formation of Binding Substance in Dolomite Cement

Nikolay

Сагдиев

2021

Lecture Notes in Civil Engineering

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Modified roman cement

Nikolay

Ruslan

2020

IOP Conf. Ser.: Mater. Sci. Eng.

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The purpose of this research is to equip the roman cement with properties exceeding the properties of the known analogies. Roman cement’s compositions modified by chemical and mineral additives have been developed and proposed. The mode of calcinations of carbonate and clay raw material with high MgO has been optimized. As a result, the durability of roman cement from 15 to 22 MPa has been received. Mineral additives like slag, zeolite breed and clay dust were chosen and used that rose the durability from 22 to 28 MPa. Plasticizers and hardening accelerators were chosen and used that allowed rising the durability up to 35 MPa relatively. A combination of complex additives have been proposed. To optimize the mode of calcinations and to define a combination of complex additives the method of mathematical planning was used. The dependence of binder’s strength from the temperature, durability of calcinations, saturation rate, type and consistence of modified additives has been acquired. Modified roman cement has the advantages if compared with known analogies and has the following features: strength 35MPa, normal consistency 30%, setting time is not earlier than 35 minutes, the end is not late than 420 minutes, softening rate is 0.98. Modified roman cement can be successfully used to produce dry building mixtures (mortar’s strength 5,10, 15 MPA), low strength mortars (strength 5,7.5 MPa) and concret (strength 10, 15, 20, 25 MPa) and other building materials. Structure of carbonate raw material and clay for the production of roman cement is recommended.

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Low-firing binders from magnesium containing carbonate raw materials

Cited by 3 publications

References 4 publications

Roman Concrete: The Material of Construction Heritage

Roman Concrete: The Material of Construction Heritage

Carbonate Phase in the Formation of Binding Substance in Dolomite Cement

Modified roman cement

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