SU697929A1 - Method of determining effective radius of air bubbles in concrete mix - Google Patents
Method of determining effective radius of air bubbles in concrete mixInfo
- Publication number
- SU697929A1 SU697929A1 SU782591267A SU2591267A SU697929A1 SU 697929 A1 SU697929 A1 SU 697929A1 SU 782591267 A SU782591267 A SU 782591267A SU 2591267 A SU2591267 A SU 2591267A SU 697929 A1 SU697929 A1 SU 697929A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- vessel
- water
- concrete mix
- air
- effective radius
- Prior art date
Links
Description
II
Изобретение относитс к определению зффективного радиуса пузырьков воздуха в бетонной смеси, размер которых вли ет на морозостойкость бетона.The invention relates to the determination of the effective radius of air bubbles in a concrete mix, the size of which affects the frost resistance of concrete.
Под эффективным радиусом понимают усредненный радиус, соответствующий среднему давлению в пузырьках, вызванному поверхностными силами.Under the effective radius understand the average radius corresponding to the average pressure in the bubbles caused by surface forces.
Известен способ определени эффективного радиуса пузырьков, при котором герметически закрьшающийс сосуд заполн ют водой до верхнего уровн водомерной трубки и через нее сверху подают сжатый воздух. Под давлением пузырьки воздуха, наход щегос в смеси снижаютс . По величине сжати пузырьков и приложенному давлению рассчитывают сначала первоначальное давление в пузырьках воздуха и затем их эффективный радиус 1 .A known method for determining the effective radius of the bubbles, in which the hermetically closed container is filled with water to the upper level of the water tube and through it, compressed air is fed from above. Under pressure, air bubbles in the mixture are reduced. From the magnitude of the compression of the bubbles and the applied pressure, we first calculate the initial pressure in the air bubbles and then their effective radius 1.
Наиболее близким по технической сути и достигаемому результату вл етс способ определени эффективного радиуса пузырьков воздуха в бетонной смеси, включающий размещение уплотненной бетонной смеси в герметичном сосуде, заполнение его водой, измерегшеThe closest in technical essence and the achieved result is a method for determining the effective radius of air bubbles in a concrete mix, including placing the compacted concrete mix in an airtight vessel, filling it with water, measuring
давлени в сосуде и расчет эффективного радиуса 2.pressure in the vessel and the calculation of the effective radius 2.
Известные способы вл ютс тpyдoeмки пf, требуют специаль1 ых приспособле{шй и кроме того вл ютс недостаточно точными.The known methods are trumped-off methods, require special adaptations and are also not sufficiently accurate.
Цель изобретени - повышение точности и упрощение устройства, а также сокращение BpcMeiffl определени за счет ускорени процесса выделени воздуха.The purpose of the invention is to improve the accuracy and simplification of the device, as well as reducing the BpcMeiffl definition by speeding up the air release process.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU782591267A SU697929A1 (en) | 1978-03-16 | 1978-03-16 | Method of determining effective radius of air bubbles in concrete mix |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU782591267A SU697929A1 (en) | 1978-03-16 | 1978-03-16 | Method of determining effective radius of air bubbles in concrete mix |
Publications (1)
Publication Number | Publication Date |
---|---|
SU697929A1 true SU697929A1 (en) | 1979-11-15 |
Family
ID=20753887
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU782591267A SU697929A1 (en) | 1978-03-16 | 1978-03-16 | Method of determining effective radius of air bubbles in concrete mix |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU697929A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4344316A (en) * | 1979-10-30 | 1982-08-17 | Canadian Patents & Development Ltd. | Method and apparatus for indicating the air content of concrete in situ |
EP0315092A2 (en) | 1987-11-03 | 1989-05-10 | Dansk Beton Teknik A/S | A method of determining the quality of an air bubble system in fresh concrete |
US4934176A (en) * | 1988-07-18 | 1990-06-19 | Mitchel Rose | Method and apparatus to determine amount of gas and size of gas voids entrained in viscous substances |
-
1978
- 1978-03-16 SU SU782591267A patent/SU697929A1/en active
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4344316A (en) * | 1979-10-30 | 1982-08-17 | Canadian Patents & Development Ltd. | Method and apparatus for indicating the air content of concrete in situ |
EP0315092A2 (en) | 1987-11-03 | 1989-05-10 | Dansk Beton Teknik A/S | A method of determining the quality of an air bubble system in fresh concrete |
US4967588A (en) * | 1987-11-03 | 1990-11-06 | Dansk Beton Teknik A/S | Method of determining the air bubble size distribution in fresh concrete, an analytical assembly and a sample taking device for use herewith |
US4934176A (en) * | 1988-07-18 | 1990-06-19 | Mitchel Rose | Method and apparatus to determine amount of gas and size of gas voids entrained in viscous substances |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Talbot et al. | The strength of concrete: its relation to the cement aggregates and water | |
McIntyre et al. | A method for determination of apparent density of soil aggregates. | |
Diamond et al. | Physics and chemistry of alkali-silica reactions | |
US8256268B2 (en) | System and method for measuring porosity of high strength and high performance concrete using a vacuum-pressure saturation method | |
Gregori et al. | Experimental simulation of self-consolidating concrete formwork pressure | |
CN104483225B (en) | Determination method of volume expansibility and contractibility of oil well cement solidification material | |
CN107328623A (en) | A kind of cementing transparent soil and preparation method thereof | |
Boivin et al. | Experimental assessment of chemical shrinkage of hydrating cement pastes | |
SU697929A1 (en) | Method of determining effective radius of air bubbles in concrete mix | |
JP5053901B2 (en) | Method for preparing specimen for ground improvement method test | |
Chaney et al. | Suggested method for soil specimen remolding by wet-raining | |
US3338563A (en) | Method of mixing high-strength concrete | |
Rice | Maximum Specific Gravity of Bituminous Mixtures by Vacuum Saturation Procedure | |
King et al. | Studies on the settlement of hydrating cement suspensions | |
Vomocil et al. | Soil tensile strength by centrifugation | |
JP4499244B2 (en) | Evaluation method for fresh concrete | |
CN105571926B (en) | A method of for making remolding soil specimens | |
Snyder et al. | A pneumatic fracture method for measuring the tensile strength of unsaturated soils | |
CN114689636B (en) | Recycled aggregate moisture migration characterization method based on low-field nuclear magnetic resonance technology | |
Tao et al. | Autogenous Shrinkage of Cement Paste Interpreted by Electrical Resistivity and Capillary Stress at Early Age | |
US2270699A (en) | Displacement measuring apparatus | |
RU90903U1 (en) | DEVICE FOR DETERMINING THE AVERAGE DENSITY OF CONCRETE AND SOLUTION MIXES | |
SU1138709A1 (en) | Method and device for measuring powder material specific surface | |
SU1383140A1 (en) | Method of determining moisture content of sand | |
CN107782595A (en) | A kind of method that air bubble mix light-textured soil sample is prepared using the temperature difference |