发明名称 |
Processes for improving the bond between hydrating cement-based materials and existing cement-based substrates |
摘要 |
Cement compositions and processes for improving the bond between new hydrating cement-based materials and the surface of "old" cement-based substrates are disclosed. A mechanically and chemically integral bond is created between the surfaces of the cement-based materials by moistening the old cement-based surface, exposing the moist surface to carbon or carbonate sources (such as with carbon dioxide) and then applying a new hydrating cement-based material thereon. The treatment of the surface of the cement-based substrate as described above creates an aqueous phase chemistry thereon which is compatible to the aqueous phase chemistry of the hydrating cement-based materials applied thereafter. The compatibility of the aqueous phase chemistries results in a mechanically and chemically integral bond formed between the surface of the old cement-based surface and the hydrating cement-based materials. The bond interface may be characterized by low calcium hydroxide concentrations, the presence of amorphous, noncrystalline material, a low water/cement ratio, greater than 90% of all voids being less than 0.15 mm. in diameter, and a low total air content of the interface. The present invention is particularly applicable to the repairing, resurfacing and topping of existing concrete highways, roads and surfaces.
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申请公布号 |
US5505987(A) |
申请公布日期 |
1996.04.09 |
申请号 |
US19950376890 |
申请日期 |
1995.01.20 |
申请人 |
JENNINGS, HAMLIN M.;KELZENBERG, ANTHONY J.;HODSON, SIMON K. |
发明人 |
JENNINGS, HAMLIN M.;KELZENBERG, ANTHONY J.;HODSON, SIMON K. |
分类号 |
B01F5/00;B01F7/00;B01F7/16;B28B1/00;B28B7/34;B28B11/24;B28B23/00;B28C5/38;C04B7/52;C04B22/00;C04B28/04;C04B40/00;C04B40/06;(IPC1-7):B05D3/10;B05D5/10;B05D1/36;B32B35/00 |
主分类号 |
B01F5/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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