English
Русский 48-63 p.
This work is aimed at studying the rheological properties and processes of structure formation in highly concentrated mineral suspensions modified with a complex organic and mineral additive based on a fluoroglu-cinifurfural oligomer and nanodiamond silicon dioxide particles.
Methods. The distribution of silicon dioxide particles and their modal size in additives were determined by laser light diffraction on the Mastersizer 3000 device and by dynamic light scattering on the Microtrac S3500 device. The rheological properties of the suspensions were determined using a coaxial cylindrical rotary viscometer of the gearless type “Rheotest-2.1”. The setting time and structure formation of the cement dough were evaluated on a Vika device. The plastic strength of the cement dough was determined using a conical Rebinder plastometer. The compressive strength of cement stone was determined using an automatic hydraulic press “PGM-100MG4”.
Conclusions. It has been established that a complex organic and mineral additive reduces the limiting dynamic shear stresses of mineral mixtures, reduces the plastic strength of mixtures in the initial period and shortens the setting time, providing a balance between deceleration and strength development due to the directional formation of consolidated supramolecular calcium silicate structures that structure the cement matrix. It was found that sili-con dioxide nanoparticles, which are part of a complex organic and mineral additive, do not affect the rheological properties of the system in the initial period, unlike Aerosil particles, which increase the limiting dynamic shear stress of the mixture, due to the high particle dispersion.
Methods. The distribution of silicon dioxide particles and their modal size in additives were determined by laser light diffraction on the Mastersizer 3000 device and by dynamic light scattering on the Microtrac S3500 device. The rheological properties of the suspensions were determined using a coaxial cylindrical rotary viscometer of the gearless type “Rheotest-2.1”. The setting time and structure formation of the cement dough were evaluated on a Vika device. The plastic strength of the cement dough was determined using a conical Rebinder plastometer. The compressive strength of cement stone was determined using an automatic hydraulic press “PGM-100MG4”.
Conclusions. It has been established that a complex organic and mineral additive reduces the limiting dynamic shear stresses of mineral mixtures, reduces the plastic strength of mixtures in the initial period and shortens the setting time, providing a balance between deceleration and strength development due to the directional formation of consolidated supramolecular calcium silicate structures that structure the cement matrix. It was found that sili-con dioxide nanoparticles, which are part of a complex organic and mineral additive, do not affect the rheological properties of the system in the initial period, unlike Aerosil particles, which increase the limiting dynamic shear stress of the mixture, due to the high particle dispersion.
1. Shapovalov N.A., Poluektova V.A. Features of the synthesis of nanomodifiers based on trifunctional oxyphe-nols for mineral suspensions. Nanotechnology in Construction. 2016. Vol. 8. No. 5. P. 100 – 115. DOI: dx.doi.org/10.15828/2075-8545-2016-8-5-100-115
2. Mukhametrahimov R.Kh., Ziganshina L.V. Technology and quality control of construction 3D printing. Izvestiya KSUACE. 2022. No. 1 (59). P. 64 – 79. DOI: 10.52409/20731523_2022_1_64 3. Neville Adam M. Prop-erties of Concrete. University of California: Pearson, 2017. 846 p.
4. Scrivener K.L., Nonat A. Hydration of cementitious materials, present and future. Cement and Concrete Re-search. 2011. T. 7. No. 41. P. 651 – 665.
5. Thomas J.J., Biernacki J.J., Bullard J.W., Bishnoi S., Dolado J.S., Scherer G.W., Luttge, A. Modeling and simulation of cement hydration kinetics and microstructure development. Cement and Concrete Research. 2011. Vol. 12. No. 41. P. 1257 – 1278.
6. Flatt R.J., Schober I. Superplasticizers and the rheology of concrete. In Understanding the Rheology of Con-crete. 2012. No. 1. P. 144 – 208.
7. Hewlett Peter Lea's Chemistry of Cement and Concretet. Ed Butterworth-Heinemann. UK: Elsevier, 2003. 1092 p.
8. Poluektova V.A. Regulation of rheological properties and aggregate stability of aqueous mineral suspensions by superplasticizer based on phloroglucinol-furfural oligomers: dis. ... Cand. of Engineering Sciences. Belgorod: BSTU, 2006. 162 p.
9. Complex additive for concretes of construction 3D printing: patent. 2806395 Russian Federation. Poluektova V.A., Starchenko S.A., Kozhanova E.P.; applicant and patent holder BSTU named after V.G. Shukhov. Application No. 2023113979; declared 05/29/2023; published 10/31/2023, Bulletin No. 31.
10. Recommendations for physicochemical control of the composition and quality of superplasticizer S-3. Mos-cow: Research Institute of Reinforced Concrete of the USSR Gosstroy, 1984. 56 p.
11. Poluektova V.A., Shapovalov N.A., Balyatinskaya L.N. Adsorption of oxyphenolfurfural oligomers on dis-persed materials. Fundamental Research. 2012. No. 6 (11). P. 1470 – 1474.
12. Poluektova V.A., Shapovalov N.A., Cherkashina N.I., Kozhanova E.P., Starchenko S.A. Regulation of the aggregate stability for binary polymer-mineral dispersions. Nanotechnologies in Construction. 2023. No. 15 (3). P. 258 – 266. https://doi.org/10.15828/2075-8545-2023-15-3-258-266
2. Mukhametrahimov R.Kh., Ziganshina L.V. Technology and quality control of construction 3D printing. Izvestiya KSUACE. 2022. No. 1 (59). P. 64 – 79. DOI: 10.52409/20731523_2022_1_64 3. Neville Adam M. Prop-erties of Concrete. University of California: Pearson, 2017. 846 p.
4. Scrivener K.L., Nonat A. Hydration of cementitious materials, present and future. Cement and Concrete Re-search. 2011. T. 7. No. 41. P. 651 – 665.
5. Thomas J.J., Biernacki J.J., Bullard J.W., Bishnoi S., Dolado J.S., Scherer G.W., Luttge, A. Modeling and simulation of cement hydration kinetics and microstructure development. Cement and Concrete Research. 2011. Vol. 12. No. 41. P. 1257 – 1278.
6. Flatt R.J., Schober I. Superplasticizers and the rheology of concrete. In Understanding the Rheology of Con-crete. 2012. No. 1. P. 144 – 208.
7. Hewlett Peter Lea's Chemistry of Cement and Concretet. Ed Butterworth-Heinemann. UK: Elsevier, 2003. 1092 p.
8. Poluektova V.A. Regulation of rheological properties and aggregate stability of aqueous mineral suspensions by superplasticizer based on phloroglucinol-furfural oligomers: dis. ... Cand. of Engineering Sciences. Belgorod: BSTU, 2006. 162 p.
9. Complex additive for concretes of construction 3D printing: patent. 2806395 Russian Federation. Poluektova V.A., Starchenko S.A., Kozhanova E.P.; applicant and patent holder BSTU named after V.G. Shukhov. Application No. 2023113979; declared 05/29/2023; published 10/31/2023, Bulletin No. 31.
10. Recommendations for physicochemical control of the composition and quality of superplasticizer S-3. Mos-cow: Research Institute of Reinforced Concrete of the USSR Gosstroy, 1984. 56 p.
11. Poluektova V.A., Shapovalov N.A., Balyatinskaya L.N. Adsorption of oxyphenolfurfural oligomers on dis-persed materials. Fundamental Research. 2012. No. 6 (11). P. 1470 – 1474.
12. Poluektova V.A., Shapovalov N.A., Cherkashina N.I., Kozhanova E.P., Starchenko S.A. Regulation of the aggregate stability for binary polymer-mineral dispersions. Nanotechnologies in Construction. 2023. No. 15 (3). P. 258 – 266. https://doi.org/10.15828/2075-8545-2023-15-3-258-266
This work is aimed at studying the rheological properties and processes of structure formation in highly concentrated mineral suspensions modified with a complex organic and mineral additive based on a fluoroglu-cinifurfural oligomer and nanodiamond silicon dioxide particles.
Methods. The distribution of silicon dioxide particles and their modal size in additives were determined by laser light diffraction on the Mastersizer 3000 device and by dynamic light scattering on the Microtrac S3500 device. The rheological properties of the suspensions were determined using a coaxial cylindrical rotary viscometer of the gearless type “Rheotest-2.1”. The setting time and structure formation of the cement dough were evaluated on a Vika device. The plastic strength of the cement dough was determined using a conical Rebinder plastometer. The compressive strength of cement stone was determined using an automatic hydraulic press “PGM-100MG4”.
Conclusions. It has been established that a complex organic and mineral additive reduces the limiting dynamic shear stresses of mineral mixtures, reduces the plastic strength of mixtures in the initial period and shortens the setting time, providing a balance between deceleration and strength development due to the directional formation of consolidated supramolecular calcium silicate structures that structure the cement matrix. It was found that sili-con dioxide nanoparticles, which are part of a complex organic and mineral additive, do not affect the rheological properties of the system in the initial period, unlike Aerosil particles, which increase the limiting dynamic shear stress of the mixture, due to the high particle dispersion.
https://doi.org/10.58224/2619-0575-2024-7-4-48-63
Methods. The distribution of silicon dioxide particles and their modal size in additives were determined by laser light diffraction on the Mastersizer 3000 device and by dynamic light scattering on the Microtrac S3500 device. The rheological properties of the suspensions were determined using a coaxial cylindrical rotary viscometer of the gearless type “Rheotest-2.1”. The setting time and structure formation of the cement dough were evaluated on a Vika device. The plastic strength of the cement dough was determined using a conical Rebinder plastometer. The compressive strength of cement stone was determined using an automatic hydraulic press “PGM-100MG4”.
Conclusions. It has been established that a complex organic and mineral additive reduces the limiting dynamic shear stresses of mineral mixtures, reduces the plastic strength of mixtures in the initial period and shortens the setting time, providing a balance between deceleration and strength development due to the directional formation of consolidated supramolecular calcium silicate structures that structure the cement matrix. It was found that sili-con dioxide nanoparticles, which are part of a complex organic and mineral additive, do not affect the rheological properties of the system in the initial period, unlike Aerosil particles, which increase the limiting dynamic shear stress of the mixture, due to the high particle dispersion.
https://doi.org/10.58224/2619-0575-2024-7-4-48-63