Housing and Urban Construction Committee of each district, Dongcheng, Xicheng District Housing City Construction Committee, Economic and Technological Development Zone Construction Bureau, each Ready-mixed concrete enterprises, all relevant units:
To supervise the pre-mixed concrete enterprises to strictly implement the main quality responsibility, continuously improve the production management level of ready-mixed concrete, and ensure the quality of ready-mixed concrete. The Municipal Housing and Urban-Rural Development Committee will follow the Notice on Further Strengthening the Quality Management of Ready-mixed Concrete (Jingjian) Act  No. 14) requested that third-party agencies commissioned the assessment of the quality of ready-mixed concrete in the first quarter of 2018. The relevant information is hereby notified as follows:
First, evaluate the overall conclusion
First, all enterprises have scores above 80, and the score of concrete test block (mixture) has reached 98.13%. Ready-mixed coagulation The quality is generally controlled; the second is the raw material sampling rate of 89.81%, an increase of 4.5 percentage points over the previous quarter, but the scores of sand, stone and admixtures are still relatively low; third, the management level of enterprises tends to be balanced, each In addition to contract management, the average scores of all indicators exceeded 90%. Fourth, the quality management level of ready-mixed concrete in various districts remained unbalanced, and some remote suburban management levels needed to be strengthened.
II. Scope of assessment and system composition
(1) Assessing the scope of the company
There are 102 ready-mixed concrete companies and sites that are normally produced during this quarter’s assessment. It accounted for 63.75% of the city’s professional contracted enterprises with ready-mixed concrete, which was 24 fewer than the previous quarter. Covering 12 districts of the city, the ready-mixed concrete enterprises in Shijingshan District have all stopped production. Specifically, there are 28 Chaoyang District, 3 Haidian District, 10 Fengtai District, 10 Daxing District, 13 Tongzhou District, 13 Changping District, 10 Fangshan District, 4 Shunyi District, 3 Pinggu District, Huairou District 2 There are 2 homes, 2 Miyun Districts and 4 Yanqing Districts; 58 of them have been discontinued or have been dismantled at the time of assessment (see Annex 1 for a list).
(2) Assessment System Composition and Adjustment
The main content of the assessment is divided into quality management system, qualification compliance, and raw material management. , equipment management, laboratory management, production management, concrete factory quality management, data management, contract management and sampling inspection, a total of 10 aspects, including 48 first-level indicators, 145 second-level indicators, 278 third-level indicators, total Divided into 100 points. At the same time, according to the special law enforcement inspection in the first quarter of 2018, the enterprises that violate the law and regulations are deducted.
Three, assess the specific situation
(1) Overall scores
The average score for this quarter is 93.50, and all companies score above 80. . There are only 1 enterprises with 85 points or less; 19 enterprises with scores between 85-90 points (including 85 points), accounting for 18.63% of the total; concrete enterprises with scores between 90-95 points (including 90 points) There are 42 in total, accounting for 41.18% of the total; 40 concrete enterprises with a score of 95 or more (including 95 points), accounting for 39.22% of the total. The specific score distribution is shown in Figure 1.
Figure 1 Distribution of concrete enterprise assessment scores in the first quarter of 2018
The company with the highest score in this quarter is 99.00 points of Fengtai West Road Branch of Beijing Gaoqiang Concrete Co., Ltd., with the lowest score. The enterprise is 83.21 points of the seven commercial concrete mixing stations of Huanchang North, Beijing Changping Yijian Construction Co., Ltd. The ranking of the concrete enterprises in the city is shown in Annex 2.
(2) Scores for each indicator system
According to the average score rate of each indicator system, the quality management system, qualifications, equipment management, laboratory management and data management of concrete enterprises in this quarter The management is better, the scoring rate is above 95%. The scores of all projects have increased compared with the previous quarter. Contract management is still the lowest scoring index. Although it has increased by 7 percentage points compared with the previous quarter, it still belongs to management. The short board needs to be continuously improved. In this quarter, the sampling rate of sampling inspection increased by 3 percentage points compared with the previous quarter, and the sampling rate of raw materials sampling was 90%. In the last quarter, it increased by 5 percentage points, and the test score of the test block and the mixture sample reached 98%, which was basically the same as that of the previous quarter. The details are shown in Figure 2.
Figure 2 Average scores for each metric in the first quarter of 2018
(3) Analysis of key indicators
According to the importance of affecting concrete quality management, this year’s innovative 278 items will be The three-level evaluation indicators are divided into quality key items and general items. Among them, there are 80 key items, involving raw material management, equipment management, laboratory management, production management, and quality management of concrete. Five key inspection items are included in this quarter. Item, qualified 7496, the pass rate is 91.86%.
( 4) Top 20 scores
This quarter, before 99-96.82 interval score the top ten companies, with an average score of 97.78 points. The scores and rankings of the top 20 companies are shown in Table 1. Among them: Beijing Gaoqiang Concrete Co., Ltd. Fengtai Xidaokou Sub-station has ranked the top 20 in the city for five consecutive quarters.
Table 1 Top 20 companies in the first quarter of 2018 score list
In general, the top 20 companies have a small gap in the total scores, and the scores of each indicator system are relatively balanced, especially in the aspects of quality management system and data management. There are no missing points. See Figure 3 for details.
Figure 3 The top 20 in the first quarter of 2018 vs. the overall score rate
(5) Scores of enterprises in each district
The average scores of the 12 jurisdictions covered by this quarter’s assessment are shown in Figure 4. According to the district rankings, Haidian District, Tongzhou District, Chaoyang District, Fengtai District and Changping District, the regional average score is higher than the city average, the urban ready-mixed concrete enterprises scores are generally higher, followed by the suburbs, the quality management level of the remote suburbs is still There is a lot of room for improvement. It is worth mentioning that Tongzhou District has ranked the top three in the city for six consecutive quarters. The average scores of each district in the past four quarters are shown in Table 2. The rankings of enterprises in each district in this quarter are shown in Annex 3.
Table 2 Average scores for each district in the past 4 quarters
Figure 4 Average score of concrete enterprises in each district in the first quarter of 2018
Four questions found in the assessment
A total of 27,642 third-level indicators were inspected in the first quarter, with 25,346 qualified, the pass rate was 91.69%; the basic pass was 1063, and the basic pass rate was 3.85. %; failed 1233 items, the failure rate was 4.46%.
(1) Quality Management System for Concrete Enterprises
The quality management system checks a total of 1938 three-level indicators, failing 8 items The non-conformity rate was 0.4%, and the most unqualified items were self-assessment records, totaling 3 items, accounting for 37.5% of the unqualified items. The lower scores of the third-level indicators are the training records, training plans, internal inspection records, quality status self-assessment records, and the performance of the site technology leaders.
(2) Qualification of concrete enterprises
Qualification management checks a total of 2,448 three-level indicators, failing 35 items The non-conformity rate was 1.4%, and the most unqualified items were occupational health and safety certificates, totaling 7 items, accounting for 20% of the unqualified items. The lower-level indicators of the third-level indicators are occupational health and safety certificates, environmental management certificates, social security for intermediate titles, social insurance for technical leaders, and labor contracts for laboratory leaders.
(3) Raw material management of concrete enterprises
The raw material management checks a total of 5712 three-level indicators, 506 failed The unqualified rate was 8.9%, of which the non-conformity was the coarse aggregate ex-factory inspection report, totaling 100 items, accounting for 19.8% of the unqualified items. The lower-level index of the third-level indicators is the coarse aggregate factory inspection report, the fine aggregate factory inspection report, the fine aggregate certificate (triple single), the coarse aggregate certificate (triple single), and the fine aggregate entry acceptance project.
(4) Management of production equipment in concrete enterprises
Production equipment management checks a total of 2040 indicators of three levels, failing 55 In the case of the item, the unqualified rate was 2.7%, and the most non-conformity was the automatic automatic weighing of the weighing, totaling 36 items, accounting for 65.5% of the unqualified items. The lower scores of the third-level indicators are the weighing dynamic automatic compensation, confirmation, equipment files, self-checking records, and equipment accounts.
(5) Management of concrete enterprise laboratory
Lab management to check a total of 8568 three-level indicators, 355 failed The failure rate was 4.1%, of which the most non-conformity was the instrument usage record, a total of 35 items, accounting for 9.9% of the unqualified items. The lower scores of the third-level indicators are instrument usage records, test records, test reports, self-calibration self-calibration records, and test records.
(6) Production management of ready-mixed concrete production enterprises
The most non-conformity is the mix adjustment record, a total of 39 The number of items was 19.8% of the unqualified items. threeThe lower scores of the grade indicators are the mix adjustment record, the workability check record of the mixture, the performance report related to the test, sand, and admixture.
(7) Quality Management of Concrete Enterprises
The factory quality management checks a total of 1530 grade three indicators, 25 failed The non-conformity rate was 1.6%, and the non-conformity of the concrete test pieces was in compliance with the requirements, a total of 9 items, accounting for 36% of the unqualified items. The lower score of the third-level indicator is whether the production method of the concrete test piece meets the requirements, whether the workability has a vehicle-by-car inspection record, the ready-mixed concrete transport form, the concrete factory certificate, and whether there is a test piece production ledger.
(8) Concrete Enterprise Data Management
Data management checks a total of 1530 three-level indicators, failing 6 times, The rate of non-conformity was 0.4%, of which the non-conformity was the raw material test record and report, totaling 2 times, accounting for 33.3% of the unqualified items. The lower-level scores of the third-level indicators are special person management, timely data filing, raw material test records and reports, filing deadlines, and concrete order contracts.
(9) Contract Management
Contract management checks a total of 306 third-level indicators, 46 failed, and failed The rate is 15%, and the non-conformity of the pre-mixed concrete contract should specify the production and operation address (both A and B), the project leader and contact information (both A and B), dispatch contact telephone, 7d and 28d standard concrete specimens The pressure strength index value and other technical requirements, a total of 38 items, accounting for 82.6% of the non-conforming items.
(10) Concrete raw materials and test blocks (mixtures) )Sampling
This season, 638 sets of ready-mixed concrete raw materials were sampled. The scoring rate was 89.81%, an increase of 4.5 percentage points from the previous quarter. Sand, stone and admixtures with relatively low scoring rate, the main unqualified parameters of sand are particle gradation and mud content, the main unqualified parameters of gravel are gradation and mud content, and the main unqualified parameters of admixture are chlorine. Ionic and alkali content. The concrete test block (mixture) was sampled in 214 groups with a score of 98.13%.
Beijing Xinjiangfeng Building Materials Co., Ltd. Changping Branch The sampling results of the concrete branch of Station, Beijing Construction Engineering Construction Co., Ltd. were unqualified and there were two or more technical indicators that had a great influence on the quality of concrete. The Municipal Housing and Urban-Rural Development Committee will initiate investigations on the two enterprises, and shall be punished according to the provisions of Article 79 of the Beijing Municipal Construction Engineering Quality Regulations and the “Beijing Municipal Urban and Rural Construction System Administrative Punishment Discretion Benchmark”. And according to the relevant regulations for scoring.
(11) Key indicator issues
A total of 8160 key items were examined during the quarter, and 664 problems were found. Specifically, there are 248 raw material quality management, 19 equipment management, 215 laboratory management, 178 production management, and 4 factory quality management. There are many problems in the management of raw material quality and laboratory, accounting for 70% of the total number of key indicators. The top five indicators of the key indicators are: test records of admixtures (32.5%), mix adjustment records (32.5%), type inspection reports for admixtures (28.3%), and other performance reports related to trials. (28.3%), test report of admixture (26.7%).
V. Next steps
(1) Standardize platform data transfer work
To ensure the accuracy, timeliness and integrity of the uploaded data for the platform to work Each ready-mixed concrete production enterprise shall, according to the data standard of “premixed concrete production and transportation information collection interface” issued by the platform, comprehensively check whether the reported data format meets the requirements, the correspondence and integrity of data transmission, and the discovery of data errors or missing items. Make corrections in a timely manner. All enterprises should complete the verification and verification of data at the end of the second quarter to ensure that the data is complete and accurate. From the third quarter onwards, the assessment will focus on the platform data. At the same time, the Municipal Housing and Urban-Rural Development Committee will increase online monitoring and analysis of platform data, and implement early warning on water-to-binder ratio, cementing material usage and weight deviation to further enhance regulatory effectiveness.
(2) Strengthening the problem-finding work
All enterprises should attach great importance to the rectification work and compare the problems found in the assessment. The list of problems will be comprehensively rectified according to the requirements, and a rectification report will be formed. In addition, the self-examination of the enterprise will be conscientiously implemented, the hidden dangers of quality will be eliminated, the quality management system will be comprehensively improved, and the quality management will be refined, systematic and normalized to ensure the factory concrete. quality.
(3) Continue to strictly control the quality of raw materials
Evaluation of raw material quality has been steadily improved since the evaluation of the six quarters However, the quality of some raw materials such as sand, stone and admixtures still has room for improvement. All ready-mixed concrete enterprises should continue to strictly control the quality of sand, stone and admixtures, attach great importance to the management of raw materials procurement, strengthen re-examination when entering the market, and do not relax and slack, and resolutely ensure the quality of raw materials.
(4) Strengthen the management of sampling inspection work
The implementation of the mutual observer system in the sampling inspection of the evaluation project from the second quarter onwards Separation system from sampling. When the system of mutual observers is sampled by one institution, another institution selects experienced technicians to supervise the whole process of sampling, and promotes the sampling process to be standardized, reasonable, fair and just. The implementation of the sampling and separation system is for individual testing projects. The two important steps in sampling testing, sampling work and inspection work are carried out by different testing organizations to avoid some of the problems that may occur during the simultaneous sampling and inspection work of the same testing organization. Just phenomenon.
(5) Trial evaluation of the observer system
Evaluate the observer system in the assessment project evaluation work from the second quarter. The ready-mixed concrete enterprises that are normally produced in our city recommend that the technicians with senior professional titles apply for the evaluation observers, participate in the concrete quality assessment process as a third party, observe the evaluation process, and make the assessment work objective and fair. Evaluation, reflecting violations, and further promoting the fair, open and fair evaluation.
(6) Continue to strengthen the investigation and punishment of violations of laws and regulations
The Municipal Housing and Urban-Rural Development Committee will continue to strengthen the ready-mixed concrete The investigation and punishment of violations of laws and regulations of enterprises has always maintained a high-pressure situation. Enterprises that use unqualified raw materials for inspection, supply of ready-mixed concrete that has not been accepted or failed to pass the inspection are resolutely investigated and punished, and they are required to The project site is physically traced to eliminate hidden dangers and fully guarantee the quality and safety of the city’s construction projects.
Annex: List of discontinued concrete enterprises in the first quarter of 1.2018
Pre-mixing in the first quarter of 2.2018General ranking of concrete enterprise evaluation
Pre-mixed concrete in the first quarter of 3.2018 Enterprise evaluation of regional business rankings
Beijing Housing and Urban-Rural Development Committee
June 15, 2018
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