The Experts below are selected from a list of 24 Experts worldwide ranked by ideXlab platform
Donghan Tang - One of the best experts on this subject based on the ideXlab platform.
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development and application of water saving and moisture retaining Membrane made from controllable high polymer materials for concrete Curing
Journal of Performance of Constructed Facilities, 2019Co-Authors: Jialiang Yao, Zhenquan Wang, Donghan TangAbstract:The conventional cement concrete pavement Curing is frequently criticized for large water consumption, high labor intensity, high cost, non-uniformed Curing quality and other problems. With an attempt to solve these problems, the research of this paper, supported by some concrete pavement construction projects and some concrete pillar construction projects in China, explored to develop a new type of Curing Membrane from the controllable high polymer materials for the concrete Curing to achieve the water saving and moisture retaining. The Curing Membrane for water-saving and moisture-retaining was developed with a new type of controllable high polymer as the interlayer material, with a specialized plastic Membrane as the carrier, and with the concrete hydration principle as the theoretical background. In the research of this paper, a series of tests were done to measure temperature and humidity of the concrete cured by different methods. Furthermore, strength, carbonization depth and cracking of the concrete slabs under different types of Curing were also tested. The results indicated that (1) the use of the new-type water-saving and moisture-retaining Membranes to cure the concrete for 28 days could retain the surface humidity of concrete up to greater than 90%; (2) the microcracks of the concrete slabs during summer construction were reduced by the combined use of a Curing agent and the new-type water-saving and moisture-retaining Membrane; and (3) compared with the natural Curing, carbonization depth of the concrete cured by the new-type Curing Membrane for 90 days was reduced by 60% while the concrete strength increased by 8.6 MPa, up to 51.6 MPa.
Yuming Zheng - One of the best experts on this subject based on the ideXlab platform.
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alleviation of reverse salt leakage across nanofiber supported thin film composite forward osmosis Membrane via heat Curing in hot water
Membranes, 2021Co-Authors: Tingyu Wang, Jiangping Chen, Quanbao Zhao, Yuming ZhengAbstract:Electrospun nanofiber with interconnected porous structure has been studied as a promising support layer of polyamide (PA) thin-film composite (TFC) forward osmosis (FO) Membrane. However, its rough surface with irregular pores is prone to the formation of a defective PA active layer after interfacial polymerization, which shows high reverse salt leakage in FO desalination. Heat-Curing is beneficial for crosslinking and stabilization of the PA layer. In this work, a nanofiber-supported PA TFC Membrane was conceived to be cured on a hot water surface with preserved phase interface for potential "defect repair", which could be realized by supplementary interfacial polymerization of residual monomers during heat-Curing. The resultant hot-water-Curing FO Membrane with a more uniform superhydrophilic and highly crosslinked PA layer exhibited much lower reverse salt flux (FO: 0.3 gMH, PRO: 0.8 gMH) than that of oven-Curing FO Membrane (FO: 2.3 gMH, PRO: 2.2 gMH) and achieved ∼4 times higher separation efficiency. It showed superior stability owing to mitigated reverse salt leakage and osmotic pressure loss, with its water flux decline lower than a quarter that of the oven-Curing Membrane. This study could provide new insight into the fine-tuning of nanofiber-supported TFC FO Membrane for high-quality desalination via a proper selection of heat-Curing methods.
Jialiang Yao - One of the best experts on this subject based on the ideXlab platform.
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development and application of water saving and moisture retaining Membrane made from controllable high polymer materials for concrete Curing
Journal of Performance of Constructed Facilities, 2019Co-Authors: Jialiang Yao, Zhenquan Wang, Donghan TangAbstract:The conventional cement concrete pavement Curing is frequently criticized for large water consumption, high labor intensity, high cost, non-uniformed Curing quality and other problems. With an attempt to solve these problems, the research of this paper, supported by some concrete pavement construction projects and some concrete pillar construction projects in China, explored to develop a new type of Curing Membrane from the controllable high polymer materials for the concrete Curing to achieve the water saving and moisture retaining. The Curing Membrane for water-saving and moisture-retaining was developed with a new type of controllable high polymer as the interlayer material, with a specialized plastic Membrane as the carrier, and with the concrete hydration principle as the theoretical background. In the research of this paper, a series of tests were done to measure temperature and humidity of the concrete cured by different methods. Furthermore, strength, carbonization depth and cracking of the concrete slabs under different types of Curing were also tested. The results indicated that (1) the use of the new-type water-saving and moisture-retaining Membranes to cure the concrete for 28 days could retain the surface humidity of concrete up to greater than 90%; (2) the microcracks of the concrete slabs during summer construction were reduced by the combined use of a Curing agent and the new-type water-saving and moisture-retaining Membrane; and (3) compared with the natural Curing, carbonization depth of the concrete cured by the new-type Curing Membrane for 90 days was reduced by 60% while the concrete strength increased by 8.6 MPa, up to 51.6 MPa.
Cccc Second - One of the best experts on this subject based on the ideXlab platform.
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test study on cement stabilized macadam base cured by water saving damp preservation Curing Membrane
Subgrade Engineering, 2014Co-Authors: Wang Xiaochua, Cccc SecondAbstract:Curing is a very important construction process to prevent cement stabilized macadam base from shrinking and cracking,and ensure its service performance. In order to provide the selection basis for cement stabilized macadam base Curing,three Curing methods,including water-saving damp-preservation Membrane,water Curing( gunny bag) and coating-sealing Curing( polyethylene film),were selected to carry out the indoor tests and verification by road engineering. The results show that gunny bag Curing is characterized by large water demand,and worst thermal insulation and anti-shrinking performance,in respect of which polyethylene film Curing is the second,second and water-saving damp-preservation Curing Membrane performs best.
Tingyu Wang - One of the best experts on this subject based on the ideXlab platform.
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alleviation of reverse salt leakage across nanofiber supported thin film composite forward osmosis Membrane via heat Curing in hot water
Membranes, 2021Co-Authors: Tingyu Wang, Jiangping Chen, Quanbao Zhao, Yuming ZhengAbstract:Electrospun nanofiber with interconnected porous structure has been studied as a promising support layer of polyamide (PA) thin-film composite (TFC) forward osmosis (FO) Membrane. However, its rough surface with irregular pores is prone to the formation of a defective PA active layer after interfacial polymerization, which shows high reverse salt leakage in FO desalination. Heat-Curing is beneficial for crosslinking and stabilization of the PA layer. In this work, a nanofiber-supported PA TFC Membrane was conceived to be cured on a hot water surface with preserved phase interface for potential "defect repair", which could be realized by supplementary interfacial polymerization of residual monomers during heat-Curing. The resultant hot-water-Curing FO Membrane with a more uniform superhydrophilic and highly crosslinked PA layer exhibited much lower reverse salt flux (FO: 0.3 gMH, PRO: 0.8 gMH) than that of oven-Curing FO Membrane (FO: 2.3 gMH, PRO: 2.2 gMH) and achieved ∼4 times higher separation efficiency. It showed superior stability owing to mitigated reverse salt leakage and osmotic pressure loss, with its water flux decline lower than a quarter that of the oven-Curing Membrane. This study could provide new insight into the fine-tuning of nanofiber-supported TFC FO Membrane for high-quality desalination via a proper selection of heat-Curing methods.
