Research on Pump Primers for Friction Reduction of Wet-Mix Shotcrete Based on Precreating Lubricating Layer
Autor: | Weimin Cheng, Guoming Liu, Lianjun Chen, Huang Ya'nan |
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Rok vydání: | 2017 |
Předmět: |
business.product_category
Materials science Article Subject 0211 other engineering and technologies 02 engineering and technology Viscosity chemistry.chemical_compound 021105 building & construction lcsh:TA401-492 medicine General Materials Science Composite material Water content Cement Pressure drop General Engineering 021001 nanoscience & nanotechnology Shotcrete chemistry lcsh:Materials of engineering and construction. Mechanics of materials Concrete pump Sodium stearate 0210 nano-technology business Xanthan gum medicine.drug |
Zdroj: | Advances in Materials Science and Engineering, Vol 2017 (2017) |
ISSN: | 1687-8442 1687-8434 |
DOI: | 10.1155/2017/3462074 |
Popis: | Wet-mix shotcrete has lower water content even though looking wet which is generally less than 8% of total content. The inner surface of pipes will absorb water from fresh concrete to wet itself if concrete pump primers is not pumped early; meanwhile, the saturated concrete is transformed into the unsaturated concrete, and pipe blockage often occurs. In order to minimize the loss of water and wet pipes, a new type of pump primers was developed to precreate the lubricating layer that is one of the most dominant factors in determining the pumping capability, which would provide a cost-effective replacement for premium priced cement-based primers. Experiments were conducted to measure the viscosity, stability, and strength of mix solution during development stage. The optimal formula was obtained by orthogonal matching tests with 0.5% sodium stearate, 0.75% xanthan gum, 0.3% polyacrylamide, and 0.4% blender (mass ratio related to mix water). The pressure drop reduction of new primers was larger than that of common primers. |
Databáze: | OpenAIRE |
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