Class B60-B80 cement concretes using crushed gravel from the Kama field

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Abstract

The results of a study of the quality of crushed stone from gravel of fr. 5–20 mm and screening of crushing of fr. 0–5 mm of the Kama field were presented and an analysis of their compliance with the requirements of regulatory documents was carried out. The characteristics of the crushing products were determined: grain composition, content of crushed grains; amount of lamellar (flaky) and needle-like shape, presence of dust-like and clay particles, crushed stone crushability during compression in a cylinder, screening fineness modulus and content of reaction silica in crushed stone and screening. Compositions of high-strength concretes of class B60–B80 were developed, in which fine quartz sand was used to enrich the crushing screening, carbonate mineral powder of MP-1 grade and microsilica (MK-85) as a filler, and polycarboxylate superplasticizer Polyplast PK as a water-reducing additive. Optimal compositions were obtained with the following cement consumption: for concrete B60 with a compression strength of 78 MPa, cement consumption was 466 kg/m3, for class B70 with a strength of 91 MPa – 483 kg/m3 and for B80 with a strength of 104 MPa – 503 kg/m3. At the same time, concrete mixtures were characterized by a cone settlement of 25–27 cm.

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About the authors

K. O. Nesterova

Kazan State University of Architecture and Civil Engineering

Author for correspondence.
Email: nesterova4301@mail.ru

Master Student 

Russian Federation, 1, Zelenaya Street, Kazan, 420043

A. R. Gizzatullin

Kazan State University of Architecture and Civil Engineering

Email: anasrg@yandex.ru

Candidate of Sciences (Engineering) 

Russian Federation, 1, Zelenaya Street, Kazan, 420043

N. N. Morozova

Kazan State University of Architecture and Civil Engineering

Email: ninamor@mail.ru

Candidate of Sciences (Engineering) 

Russian Federation, 1, Zelenaya Street, Kazan, 420043

I. I. Gainutdinov

Kazan State University of Architecture and Civil Engineering

Email: gailfat16@mail.ru

Master Student 

Russian Federation, 1, Zelenaya Street, Kazan, 420043

V. G. Khozin

Kazan State University of Architecture and Civil Engineering

Email: Khozin.Vadim@yandex.ru

Doctor of Sciences (Engineering), Professor 

Russian Federation, 1, Zelenaya Street, Kazan, 420043

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Supplementary files

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2. Fig. 1. Fractional composition of crushed gravel

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3. Fig. 2. Screening type of gravel crushing with fraction of 0–5 mm, ×100 magnification – a and b; particles of gravel crushing screening with fraction of 0–0.008 mm – c

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4. Fig. 3. Graph of fractional composition of sand from crushed gravel screenings

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5. Fig. 4. Concrete fracture on crushed gravel

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6. Fig. 5. Concrete fracture on syenite rubble

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7. Fig. 6. Graph of change in strength of fine-grained concrete from cement consumption

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