Concrete pouring
Release time:
2020-07-07
concrete pouring should comply with the corresponding construction specifications, special attention should be paid to:
1, concrete in the construction of water-absorbing objects involved in the corresponding treatment before pouring, in order to avoid concrete moisture absorption, affecting the quality of concrete.
2, concrete should be poured before the initial setting, and there can be no segregation phenomenon, if there is segregation phenomenon, should be re-mixing, before pouring, and pouring process should also avoid segregation phenomenon.
3. When pouring structures such as columns, a layer of 50-100mm cement mortar (the mix ratio is the same as that in concrete) shall be poured at the bottom to avoid honeycomb pitting.
4, concrete pouring, should be carried out in layers according to the structural requirements, with pouring and tamping.
5. The overall concrete pouring of general structures shall be carried out continuously as much as possible to avoid intermittent construction. In the initial stage after concrete pouring, the concrete shall be protected from vibration or impact.
7. When making cement floor, roof platform and other parts, attention should be paid to the plastering operation. Generally, it should be plastered many times until there is no bleeding on the surface, but dry powder should not be sprinkled and cured in time during the plastering process.
8. In order to prevent early cracks in road construction, attention should be paid to:
①. Under the condition of meeting the design grade of concrete, accurate measurement should be made, excessive cement should not be used, and the unit water consumption of concrete should be mastered to reduce the shrinkage of concrete.
②, do not use high-temperature cement, the cement temperature during site construction should be lower than 70 ℃. In summer construction, the pouring temperature of concrete should be reduced as much as possible, the operation time from the beginning of pouring to the completion of surface finishing should be shortened, and the concrete should be fully cured. Regardless of the circumstances and conditions, the temperature of the concrete mixture shall not exceed 35 ℃. During winter construction, the mixing time should be extended, and the discharge temperature should not be lower than 10 ℃. At the same time, after the construction of pavement concrete, the first three days of maintenance temperature should be maintained above 10 ℃, the next 7 days of maintenance temperature should be maintained above 5 ℃.
③. When using dry aggregate exposed to sunlight for a long time, water shall be fully sprinkled to cool down.
④, the top surface of the base should be fully wet before pouring concrete, or take waterproof measures.
⑤, concrete surface finishing process, to avoid direct sunlight, do not make the temperature rise and dry.
⑥. According to the strength development, master the appropriate time for plate cutting to prevent the concrete slab from breaking.
Peak Cement Implementation GB175-1999 Standard Strength Guarantee Value
| Product Species |
Strength Grade |
Compressive Strength Mpa |
flexural strength Mpa |
||
| 3d |
28d |
3d |
28d |
||
| silicate cement |
42.5R |
25.0 |
48.0 |
4.5 |
7.5 |
| 52.5 |
27.0 |
56.0 |
4.5 |
8.0 |
|
| Ordinary Silicate Cement |
32.5R |
18.0 |
40.0 |
4.0 | #
6.5 |
| 42.5 |
20.0 |
48.0 |
4.0 |
7.5 |
|
| 42.5R |
23.0 |
48. |
4.5 |
7.5 |
|
| 52.5 |
26.0 |
56.0 |
4.5 |
8.0 |
|
| Composite Cement |
32.5R |
18.0 |
40.0 |
4.0 |
6.5 |
More information
News from our newspaper On the occasion of the celebration of the 60th anniversary of Jianfeng's entrepreneurship, the selection results of the two competitions of "Me and Jianfeng" essay and employee calligraphy and painting photography exhibition are also fresh. Since July 2017, more than 50 contributions have been received from employees and their families. According to the overall situation of the content and writing level of the solicitation, 3 first prize works, 5 second prize works and 7 third prize works were selected. The staff calligraphy and painting photography exhibition began to call for contributions in early April. in just five months, it received more than 100 works from dozens of authors from various enterprises under the group, and successfully held the exhibition from October 10 to 17, which was welcomed and praised by the majority of employees. After a comprehensive selection of employee contributions, a total of 3 first-class works, 5 second-class works, and 7 third-class works were selected. In order to ensure the fairness and impartiality of the selection, the works of the leading group, working group members and specially invited works to commemorate the 60th anniversary of Jianfeng Entrepreneurship will not participate in the selection of the grade award. (The list of winners is attached) (This reporter) "I and the peak" essay list first prize "mother and son deep love" author: Daye peak Shi Fu "I have a date with the peak" author: Yunnan peak Luo Meiyan "buying a house" author: peak cable Lu Chaofang second prize "ten years, sixty years" author: pharmaceutical sales company Xu Yuting "my peak road" author: daye Peak Yang Zhendong's "My Teacher" Author: Fan Tufa, Municipal Pharmaceutical Company, "Peak Grows with Me for 20 Years" Author: Xu Junxiong, Pharmaceutical Sales Company, "Peak Grows with Me"
2020
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News from our newspaper On the occasion of the celebration of the 60th anniversary of Jianfeng's entrepreneurship, the selection results of the two competitions of "Me and Jianfeng" essay and employee calligraphy and painting photography exhibition are also fresh. Since July 2017, more than 50 contributions have been received from employees and their families. According to the overall situation of the content and writing level of the solicitation, 3 first prize works, 5 second prize works and 7 third prize works were selected. The staff calligraphy and painting photography exhibition began to call for contributions in early April. in just five months, it received more than 100 works from dozens of authors from various enterprises under the group, and successfully held the exhibition from October 10 to 17, which was welcomed and praised by the majority of employees. After a comprehensive selection of employee contributions, a total of 3 first-class works, 5 second-class works, and 7 third-class works were selected. In order to ensure the fairness and impartiality of the selection, the works of the leading group, working group members and specially invited works to commemorate the 60th anniversary of Jianfeng Entrepreneurship will not participate in the selection of the grade award. (The list of winners is attached) (This reporter) "I and the peak" essay list first prize "mother and son deep love" author: Daye peak Shi Fu "I have a date with the peak" author: Yunnan peak Luo Meiyan "buying a house" author: peak cable Lu Chaofang second prize "ten years, sixty years" author: pharmaceutical sales company Xu Yuting "my peak road" author: daye Peak Yang Zhendong's "My Teacher" Author: Fan Tufa, Municipal Pharmaceutical Company, "Peak Grows with Me for 20 Years" Author: Xu Junxiong, Pharmaceutical Sales Company, "Peak Grows with Me"
2020
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2020
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"Active Dendrobium superfine powder" technology patented
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2020
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News from our newspaper The recently published national periodical "Building Materials Development Orientation" uses the corporate image photo of Yunnan Jianfeng Cement Company on the cover; the "13th China Yunnan Pu'er Tea International Expo and Fair" held on August 26-28 During the period, the local mainstream media "Pu'er Daily" also used a large amount of space to publicize the achievements of Yunnan Jianfeng in many aspects. Since it was put into production, the company has strengthened its image publicity through various channels, and the social influence of the company has been continuously improved. As a relatively late cement enterprise in southwest Yunnan, Yunnan Jianfeng has always attached great importance to the construction of corporate culture and image promotion. "Building Materials Development Orientation" magazine is sponsored by the China Building Materials Industry Economic Research Association and other units. It is the only comprehensive scientific and technological journal of building materials in the country. It takes technological innovation, management innovation, and market innovation as its purpose, and takes the national, orientation, and novelty as its goal. It has a relatively wide influence on the high-level managers and engineering and technical personnel of the building materials industry and enterprises. China Yunnan Pu'er Tea International Expo is an international exhibition co-sponsored by the Ministry of Agriculture and the People's Government of Yunnan Province. During this period, seizing the opportunity to promote enterprises is conducive to breaking through geographical limitations and gaining a wider impact. In the daily publicity work, Yunnan Jianfeng also cooperated with Pu'er TV station to broadcast the corporate image propaganda film in prime time after the news broadcast, and used self-media such as "Pu'er on the Cloud" to promote the spirit of Jianfeng enterprise. Every year during the Spring Festival, the company will expand its reputation through Xishuangbanna TV Station and Pu'er TV Station in the form of New Year greetings. With Yunling High-speed Media, Today's Biography
2020
07-31
News from our newspaper The recently published national periodical "Building Materials Development Orientation" uses the corporate image photo of Yunnan Jianfeng Cement Company on the cover; the "13th China Yunnan Pu'er Tea International Expo and Fair" held on August 26-28 During the period, the local mainstream media "Pu'er Daily" also used a large amount of space to publicize the achievements of Yunnan Jianfeng in many aspects. Since it was put into production, the company has strengthened its image publicity through various channels, and the social influence of the company has been continuously improved. As a relatively late cement enterprise in southwest Yunnan, Yunnan Jianfeng has always attached great importance to the construction of corporate culture and image promotion. "Building Materials Development Orientation" magazine is sponsored by the China Building Materials Industry Economic Research Association and other units. It is the only comprehensive scientific and technological journal of building materials in the country. It takes technological innovation, management innovation, and market innovation as its purpose, and takes the national, orientation, and novelty as its goal. It has a relatively wide influence on the high-level managers and engineering and technical personnel of the building materials industry and enterprises. China Yunnan Pu'er Tea International Expo is an international exhibition co-sponsored by the Ministry of Agriculture and the People's Government of Yunnan Province. During this period, seizing the opportunity to promote enterprises is conducive to breaking through geographical limitations and gaining a wider impact. In the daily publicity work, Yunnan Jianfeng also cooperated with Pu'er TV station to broadcast the corporate image propaganda film in prime time after the news broadcast, and used self-media such as "Pu'er on the Cloud" to promote the spirit of Jianfeng enterprise. Every year during the Spring Festival, the company will expand its reputation through Xishuangbanna TV Station and Pu'er TV Station in the form of New Year greetings. With Yunling High-speed Media, Today's Biography
2020
07-31
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