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一、概况为适应莆田市国税局综合大厦人工控孔桩桩头静载试验的桩帽砼（C45）设计的需要，应用科榕牌UEA膨胀剂配制C45砼，初次尝试成功，具体情况如下：1、原材料：（1）种植牌U型膨胀剂（40级）。（2）建福牌425R复合水泥（28d抗压达50Mpa）。（3）青口产中砂（Mx＝2.45）。
I. Overview In order to meet the needs of the design of pile caps (C45) for the static load test of the artificially controlled borehole pile heads of the Comprehensive Building of the State Taxation Bureau of Putian City, the C45 cassette was formulated with the UEA expander agent of Keshao brand. The initial success was as follows: 1, raw materials: (1) planting brand U-type expansion agent (40). (2) Jianfu Brand 425R composite cement (28d compressive strength up to 50Mpa). (3) Mussel production sand (Mx = 2.45).