Xie Zili continued: "Regarding the maintenance of test specimens, it is also an issue that needs to be paid attention to. Pen Fun Pavilion wWw. ｂiquge。 infoWe also know that the site conditions of our construction site are not very good, so some sites just make a pool, put water turtles to heat in winter, and let it be natural in summer. However, this is extremely non-standardized, and the curing conditions are not up to standard, which will have a great impact on the final strength of the concrete specimen, and we will not be responsible if the strength test is unqualified. Of course, in the process of concrete supply, we will understand the customer's site from time to time, and if we find this situation, we will send a letter to ask the customer to rectify, so I hope you can understand this. ”

Jin Xiaoya nodded and said: "Chief Engineer Xie, please rest assured, at this point, we, Julong Real Estate Company, as the owner unit, will also strictly require the construction unit to do it." I wonder if our comrades from Chuansha Erjian have anything to say?"

At this time, a middle-aged man sitting on the side said: "Let me say a few words, I am Zhang Ran, the manager of the project department of Chuansha Erjian Golden Mile Garden, Chief Engineer Xie is very right just now, and we must do this." In the process of specimen forming and curing, it should be in accordance with the specifications. This is not only responsible for the concrete batching plant, but also responsible for ourselves, no one wants the concrete specimen to fail the test, right?

Xie Zili nodded and said, "That's for sure, if there is a problem with the strength of the entity structure, we will definitely investigate the cause as soon as possible." However, there are many reasons that affect the strength of the solid structure, not only the reasons for commercial concrete, sometimes the construction reasons also account for a large part, of course, this is to talk about the standardization of the concrete pouring process, and then our production department manager Wan will talk about it, I will not go into details. I would like to emphasize once again that the comrades in charge of our construction unit must check more, and the surface should be covered with an impermeable film immediately after the specimen is formed. The standard maintenance of the specimen should be allowed to stand for one day and two days and nights in the environment with a temperature of 20±5 °C, and then number and remove the mold. Immediately after the mold is removed, it should be placed in a standard curing room with a temperature of 20±2 °C and a relative humidity of more than 95%, or cured in a non-flowing calcium hydroxide saturated solution at a temperature of 20±2 °C. The specimens in the standard curing room should be placed on the bracket at a distance of 10~20mm from each other, and the surface of the specimen should be kept moist and should not be directly washed by water. The demoulding time of the specimen under the same condition can be the same as that of the actual component, and the specimen still needs to be cured under the same condition after the demoulding is removed. ”

After a pause, Xie Zili said again: "The standard curing age is 28 days, which starts from stirring and adding water. Party B is our company for the ready-mixed concrete professional production unit, Party A and the project supervisor can at any time to our raw materials, production mixing, quality control and other related links to inspect and guide, if necessary, can also be sampling inspection of concrete raw materials or the production process of side station supervision. ”

Jin Xiaoya nodded and said, "Well, both of us have to supervise each other, which is also to be responsible for the quality of the project!"

Xie Zili said: "Next, I would like to invite Comrade Wan Yuelin, the manager of the production department of our company, to talk about production planning and collaboration!"

Wan Yuelin also said loudly: "Comrades of Party A and the supervision unit, I will talk about the process of concrete supply, which you should pay attention to, such as reporting plans and pouring preparations. First of all, when it comes to the production plan, you, that is, Party A, will provide us with the daily, weekly and monthly plan in a timely and accurate manner, so that Party B can do a good job in the preparation of concrete technology, man-machine resources and the procurement of special raw materials. Second, Party A's concrete pouring plan should be filled in writing with the "ready mixed concrete supply plan", fax or text message, and Party B should be notified of the dispatch before 14:00 the day before, and indicate the strength grade, location, opening time, pouring amount, Pouring method and technical requirements, including the number and part will be used as the basis for the information issued by our company, be sure to fill in accurately; when the supply plan needs to be changed for some reason, Party B should be notified 8 hours in advance, so that Party B can adjust the production organization plan in time, if Party A's plan is wrong or not timely, it has nothing to do with Party B. ”

"Each opening and closing, Party B's front field scheduling should be present to coordinate the construction procedures with Party A's foreman, such as the order of sub-labeling, departure, etc., and the estimation, the estimation should be as accurate as possible to avoid waste. Party B prepares the production plan and organizes the implementation according to the "ready-mixed concrete supply plan" submitted by Party A; if other force majeure fails to arrange the engineering concrete production task in time, Party B shall inform Party A in time to agree on the pouring time. During the production process, the two sides maintain constant contact, reasonably schedule the production and supply of concrete according to the dynamic process of production, and try to achieve a basic balance between production and construction. ”

"Let me talk about engineering cooperation, first of all, technical coordination, Party A must provide Party B in writing with concrete design and construction technical requirements and concrete construction pouring plan: conventional general concrete should be 3 days in advance, and special concrete should be 1 month in advance, so as to ensure that Party B has enough time for test preparation, mix ratio preparation and necessary production technology preparation. Party B should fully consider the characteristics of concrete engineering and construction technical conditions when formulating concrete quality control and production and supply plans, and Party A should fully consider the material characteristics and production and supply conditions of ready-mixed concrete when preparing concrete engineering construction plans. ”

"The overall quality of concrete engineering requires the cooperation and cooperation of all aspects of engineering construction, and the relevant parties should conduct full research and technical demonstration for the concrete production and construction technical scheme of key and important structural parts or structural components, and jointly formulate technical and quality assurance measures if necessary. When the strength of the concrete specimen is abnormal, Party A and Party B must find the cause in time, and should take measures to correct the problem in time to ensure the production and construction quality of the follow-up concrete; Party B should focus on finding the cause from the raw materials, mix ratio, batching measurement and production mixing, etc., and Party A should focus on finding the cause from the mold test accuracy, sampling production method, specimen management and maintenance conditions. ”

"The concrete production unit is responsible for the concrete quality assessment, and the concrete quality assessment is based on the requirements of the "Concrete Structure Engineering Construction Quality Acceptance Specification" and the "Ready Mixed Concrete" standard, and is designated by qualified test personnel to sample and make, and the compressive strength of the specimen is cured for 28 days according to the standard, and 60 days are required to be used as the quality assessment standard for this batch of concrete. (To be continued.) )