砂漿擴(kuò)展度筒是我公司依照GB50119-2013《混凝土外加劑應(yīng)用技術(shù)規(guī)范》標(biāo)準(zhǔn)而設(shè)計(jì)制造的，各項(xiàng)指標(biāo)符合相應(yīng)的 和行業(yè)標(biāo)準(zhǔn)。適用于試驗(yàn)各類(lèi)含減水組分的混凝土外加劑與混凝土其它原材料的相容性。
The mortar expansion tube is designed and manufactured by our company in accordance with GB50119-2013 "Technical Specifications for the Application of Concrete Admixtures", and the indicators meet the corresponding and industry standards. It is suitable for testing the compatibility of various concrete admixtures containing water-reducing components with other concrete raw materials.
砂漿擴(kuò)展度筒試驗(yàn)所用儀器設(shè)備應(yīng)符合下列規(guī)定：
★水泥膠砂攪拌機(jī)：符合現(xiàn)行行業(yè)標(biāo)準(zhǔn)《行星式水泥膠砂攪拌機(jī)》JC/T 681的要求；
★砂漿擴(kuò)展度筒：內(nèi)壁光滑無(wú)接縫的筒狀金屬制品，筒壁厚度不應(yīng)小于2mm
尺寸如下，
頂部?jī)?nèi)徑d：50±1mm，
底部?jī)?nèi)徑D：100±1mm，
高度h：150±1mm；
★搗棒：直徑8±0.2mm，長(zhǎng)300±3mm的鋼棒，端部應(yīng)磨圓；
★玻璃板：500mm×500mm×5mm；
★游標(biāo)卡尺：量程500mm，分度值1mm；
★刮刀；
★秒表：分度值0.1s；
★時(shí)鐘：分度值1s；
★天平：稱(chēng)量100g；分度值0.01g；
★臺(tái)秤：稱(chēng)量5kg，分度值1g。
The equipment used in the mortar expansion cylinder test shall meet the following requirements:
★ Cement mortar mixer: meet the requirements of the current industry standard "planetary cement mortar mixer" JC / T 681;
★ Mortar expansion tube: tube-shaped metal products with smooth inner wall and no joint, the thickness of the tube wall should not be less than 2mm
The dimensions are as follows,
Top inner diameter d: 50 ± 1mm,
Bottom inner diameter D: 100 ± 1mm,
Height h: 150 ± 1mm;
★ Tamping rod: a steel rod with a diameter of 8 ± 0.2mm and a length of 300 ± 3mm; the end should be rounded;
★ Glass plate: 500mm × 500mm × 5mm;
★ Vernier caliper: 500mm range, 1mm division value;
★ scraper;
★ Stopwatch: division value 0.1s;
★ Clock: 1s division value;
★ Balance: Weigh 100g; division value 0.01g;
★ Bench scale: Weighing 5kg, the division value is 1g.
試驗(yàn)所用材料、配合比及環(huán)境條件：
★水泥：工程實(shí)際使用水泥；
★砂: 工程實(shí)際使用砂，需篩除粒徑大于5mm以上部分；
★礦物摻合料: 工程實(shí)際使用摻合料；
★外加劑：工程實(shí)際使用外加劑；
★砂漿配合比：與工程實(shí)際用混凝土配合比中的砂漿相同，水膠比降低0.02，砂漿總量約3000±50g；
★砂漿初始擴(kuò)展度要求：對(duì)于高性能減水劑、高效減水劑和泵送劑，砂漿初始擴(kuò)展度應(yīng)控制在350±20mm，對(duì)普通減水劑，砂漿初始擴(kuò)展度宜控制在260±20mm；
★試驗(yàn)室條件應(yīng)符合現(xiàn)行 標(biāo)準(zhǔn)《水泥膠砂強(qiáng)度檢驗(yàn)方法(ISO法) 》GB/T 17671的要求。
Test materials, mix ratios and environmental conditions
★ Cement: The actual use of cement in the project;
★ Sand: The actual sａnd used in the project needs to be screened for particles larger than 5mm;
★ Mineral admixture: the actual use of the admixture;
★ Admixtures: Admixtures are actually used in the project;
★ Mortar mix ratio: The same as the mortar in the actual concrete mix ratio of the project, the water-binder ratio is reduced by 0.02, and the total mortar is about 3000 ± 50g;
★ Requirement for initial expansion of mortar: For high-performance superplasticizers, superplasticizers and pumping agents, the initial expansion of mortar should be controlled at 350 ± 20mm, and for common superplasticizers, the initial expansion of mortar should be controlled at 260 ± 20mm ;
★ Laboratory conditions should meet the requirements of the current standard "Cement Mortar Strength Test Method (ISO Method)" GB / T 17671.
砂漿擴(kuò)展度筒試驗(yàn)方法步驟：
★將玻璃板放置在水平位置，用濕布將玻璃板、砂漿擴(kuò)展度筒、攪拌葉片及攪拌鍋內(nèi)壁均勻擦過(guò)，使其表面濕而不帶水滴；
★將砂漿擴(kuò)展度筒放在玻并用濕布覆蓋待用；
★按混凝土配合比的比例稱(chēng)取水泥、摻合料、砂及外加劑待用；
★外加劑為液體時(shí)，先將預(yù)混的膠凝材料加入攪拌鍋內(nèi)，再加入與水混合均勻的外加劑溶液；外加劑為固體時(shí)，先將預(yù)混的膠凝材料及外加劑加入攪拌鍋內(nèi)，再加入水；
★從加水時(shí)刻開(kāi)始計(jì)時(shí)；
★啟動(dòng)砂漿攪拌機(jī)，攪拌30秒后開(kāi)始自動(dòng)加砂，30秒內(nèi)加完，按砂漿攪拌機(jī)程序自動(dòng)攪拌4min；
★攪拌完畢，將砂漿分兩次倒入砂漿擴(kuò)展度筒，每次約倒入筒高的1/2，并用搗棒自邊緣向 按順時(shí)針?lè)较蚓鶆虿鍝v15下，A后，表面用刮刀刮平，將筒緩慢勻速垂直提起，10秒后用游標(biāo)卡尺量取相互垂直的兩個(gè)方向的A大直徑，取其平均值作為砂漿擴(kuò)展度；
★砂漿擴(kuò)展度未達(dá)到目標(biāo)值時(shí)，需調(diào)整減水劑摻量，重復(fù)本條第1 -7款的試驗(yàn)步驟，直至達(dá)到砂漿擴(kuò)展度目標(biāo)值為止；
★將試驗(yàn)砂漿重新倒入攪拌鍋中，并用濕布覆蓋攪拌鍋，至加水后10min（高性能減水劑需做）、30min、60min，開(kāi)啟攪拌機(jī)，快速攪拌1min，按本條第7款步驟測(cè)定砂漿擴(kuò)展度。
Test method steps of mortar spreading cylinder
★ Place the glass plate in a horizontal position, and wipe the glass plate, mortar expansion cylinder, stirring blade and the inner wall of the stirring pot with a damp cloth to make the surface wet without water droplets;
★ Put the mortar expansion tube in the center of the glass plate and cover it with a wet cloth for use;
★ Weigh cement, admixture, sａnd and admixture according to the proportion of concrete mix ratio for use;
★ When the admixture is liquid, first add the premixed gelling material to the mixing pot, and then add the admixture solution that is evenly mixed with water; when the admixture is solid, first add the premixed gelling material and admixture to the stirring Add water to the pot;
★ Start counting from the moment of water filling;
★ Start the mortar mixer, and automatically add sａnd after 30 seconds of stirring. After 30 seconds, add the sａnd automatically. Follow the mortar mixer program for 4 minutes.
★ After mixing, pour the mortar into the mortar expansion cylinder twice, pour about 1/2 of the height of the cylinder each time, and use a tamper to insert 15 times in a clockwise direction evenly. After A, the surface Scrape it flat with a spatula, lift the cylinder slowly and evenly and vertically. After 10 seconds, use a vernier caliper to measure the large diameter A in two directions perpendicular to each other, and take the average value as the mortar expansion degree;
★ When the mortar expansion does not reach the target value, the amount of water reducing agent needs to be adjusted and the test steps in paragraphs 1-7 of this article are repeated until the mortar expansion target is reached;
★ Pour the test mortar into the mixing pot again, and cover the mixing pot with a damp cloth. After adding water for 10min (high-performance water reducing agent needs to be done), 30min, 60min, turn on the mixer and stir for 1min quickly. Scalability.
砂漿擴(kuò)展度筒試驗(yàn)結(jié)果評(píng)價(jià)：
1 應(yīng)根據(jù)外加劑摻量和砂漿擴(kuò)展度經(jīng)時(shí)損失判斷外加劑與混凝土其它原材料的相容性；
2 對(duì)試驗(yàn)結(jié)果有異議時(shí)，可按實(shí)際混凝土配合比進(jìn)行試驗(yàn)驗(yàn)證；
3 宜注明所用外加劑和混凝土原材料的品種、等 、生產(chǎn)廠，及實(shí)驗(yàn)室溫度、濕度等。
Evaluation of mortar expansion tube test results
1. The compatibility of the admixture with other raw materials of concrete should be judged based on the admixture amount and the loss of mortar expansion over time;
2 If there is any objection to the test results, the test can be verified according to the actual concrete mix ratio;
3. It should be noted the types, etc. of the admixtures and concrete raw materials used, production plants, and laboratory temperature and humidity.
