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路面拋丸機在橋面拋丸施工

LANMU:CHANPINWENDA YUEDU:1925

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SAN、NIZIDEXIUBUGONGZUO

1、經拋丸機施工處理后的基層缺陷得以充分暴露,在混凝土橋面形成無數的孔洞。孔洞中的潮氣或空氣在噴涂施工后受熱膨脹會引起涂層表面形成針孔,影響涂層表觀質量。為保證施工質量,對于梁面驗收過程中處理過的部位,可通過調整拋丸機的行走速度來控制基層粗糙度,避免出現過拋現象,對于后續施工帶來不便。對基層表面進行檢查,并采用修補膩子進行修補,一般采用環氧砂漿修補膩子刮涂2~3遍:
第一遍滿刮,采用砂漿型環氧樹脂修補材料(環氧樹脂+石英砂),處理大的孔洞、裂縫及泄水孔、陰角細部缺陷。
第二遍局部處理用砂漿型環氧樹脂修補大的孔洞、氣孔和凸凹不平的地方(若沒有該遍可以省略)。
第三遍滿刮,膩子型環氧樹脂修補材料(環氧樹脂+滑石粉)用于密封細微氣孔。

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