施工现场常见工程材料见证取样要求全指南
在建筑工程质量控制中，材料见证取样是确保工程质量的重要环节。 本文将详细介绍各类常见工程材料的见证取样要求，帮助施工单位和监理人员规范操作流程。
In construction quality control, material witness sampling is a crucial link to ensure project quality. This article details the witness sampling requirements for various common construction materials to help construction units and supervisors standardize operating procedures.
混凝土材料取样要求 | Concrete Material Sampling Requirements
1. 结构混凝土抗压强度试块：每≤100盘或100立方米同配合比的混凝土，取样≥1次（一组3块）；连续浇筑≥1000M3时，每200M3取样≥1次。
1. Structural concrete compressive strength test blocks: For every ≤100 batches or 100 cubic meters of concrete with the same mix ratio, sample ≥1 time (3 blocks per group); when continuous pouring ≥1000M3, sample ≥1 time per 200M3.
钢筋及连接件取样 | Steel Bars and Connectors Sampling
13. 热轧带肋或光圆钢筋：同品种同牌号同规格，每60吨为1检验批，每批取样一组做2拉2弯。
13. Hot-rolled ribbed or plain steel bars: Same type, grade and specification, every 60 tons as one inspection batch, sample one group per batch for 2 tensile and 2 bending tests.
防水材料取样 | Waterproof Material Sampling
16. 防水涂料：同一规格品种牌号，每10吨取样一组（2Kg），双组份的各5吨取样一组。
16. Waterproof coatings: Same specification type and grade, sample one group (2Kg) per 10 tons; for two-component types, sample one group per 5 tons of each component.
节能材料取样 | Energy-saving Material Sampling
21. 建筑节能：上海规定单位工程建筑面积小于6000平米，同一厂家同一品种墙体节能材料，每个单位工程复试不少于1次。
21. Building energy efficiency: Shanghai regulations require that for projects with building area less than 6000m2, the same manufacturer's same type of wall energy-saving material should be retested at least once per unit project.
其他特殊材料取样 | Other Special Material Sampling
29. 室内花岗岩或瓷质砖：同一品种每200M2做放射性复试1次，取样2份每份3公斤。
29. Indoor granite or porcelain tiles: For the same type, conduct radioactivity retest once per 200M2, sampling 2 portions of 3kg each.
注意事项：以上取样要求可能因地区规范不同而有所调整，建议施工前咨询当地质检部门。
Notes: The above sampling requirements may vary according to local regulations. It is recommended to consult local quality inspection departments before construction.
