Mortar pressure testing machine is our company's product. The intelligent instrument can convert the pressure value and automatically convert the average value of each test block. It is mainly used to determine the compressive strength of cement and mortar trabecular test blocks. The mortar pressure testing machine has been greatly improved in terms of electro-hydraulic loading and sensor force measurement, and the intelligent instrument shows a more stable force value. Not affected by natural gas frequency, high indication sensitivity, compact structure, novel shape, convenient operation, simple maintenance, convenient transportation, etc.
Technical parameters of mortar pressure tester;
A large load: 300KN
★ Accuracy etc. **: 1 **
Force measurement range: 30--300KN
A small resolution: 0.1KN
★ Using instrument voltage: 220V ± 10%
Motor use voltage: 380V ± 10%
★ Motor power: 0.75KW
Relative error of displayed value: ± 1%
★ Hydraulic pressure A: 25MPa
★ Dimensions: 840X530X1450mm
★采用立方体试件，每组试件 3 个。
★应用黄油等密封材料斜抹试模的外接缝，试模内涂刷薄层机油 或脱模剂，将拌制好的砂浆一次性装满砂浆试模，成型方法根据稠度 而定。当稠度≥50 ㎜时采用人工振捣成型，当稠度<50 ㎜时采用振动 台振实成型。 1)人工振动：用捣棒均匀地由边缘向中按螺旋方式插捣 25 次， 插捣过程中如砂浆沉落低于试模口，应随时添加砂浆，可用油灰刀插 捣数次，并用手将试模一边抬高 5 ㎜～10 ㎜各振动 5 次，使砂浆高 出试模顶面 6 ㎜～8 ㎜。 2)机械振动：将砂浆一次装满试模，放置到振动台上，振动时试 模不得跳动，振动 5～10 秒或持续至表面出浆为止;不得过振。
★ 待表面水分稍干后，将高出试模部分的砂浆沿试模顶面刮去并 抹平。
★试件制作后应在室温为(20±5)℃的环境下静置(24±2)h，当气温 较底时， 可适当延长时间， 但不应超过两昼夜， 然后对试件进行编号、 拆模。 试件拆模后应立即放入温度为(20±2)℃相对湿度为 90%以上的 试件拆模后应立即放入温度为 ℃ 以上的 标准养护室中养护。养护期间，试件彼此间隔不小于 10 ㎜，混合砂 标准养护室中养护 浆试件上面应覆盖以防有水滴在试件上。
Mortar pressure testing machine, mortar compressive strength test method
★ Using cube test pieces, 3 test pieces per group.
★ Apply sealing materials such as butter to obliquely wipe the external joints of the test mold, apply a thin layer of engine oil or mold release agent to the test mold, and fill the mixed mortar with the mortar test mold at one time. The molding method depends on the consistency. When the consistency is greater than or equal to 50 , artificial vibration and compaction are adopted. When the consistency is less than 50 , the vibration table is used for compaction. 1) Artificial vibration: Use a tamper to insert and tamp 25 times from the edge to the center in a spiral manner. If the mortar sinks below the test die during the tamping process, mortar should be added at any time, and a putty knife can be used for tamping several times. Raise the test mold side by 5 ㎜ ～ 10 一边 for 5 times each time, so that the mortar is 6 6 ～ 8 高 above the top surface of the test dies. 2) Mechanical vibration: Fill the test mold with the mortar once and place it on the shaker. The test mold must not jump during vibration. The vibration should last 5 to 10 seconds or continue until the surface is out of slurry. Do not overvibrate.
★ After the surface moisture is slightly dry, scrape the mortar that is higher than the test mold along the top surface of the test mold and smooth it.
★ After the test piece is made, it should be left at room temperature (20 ± 5) ℃ for (24 ± 2) h. When the temperature is low, the time can be appropriately extended, but it should not exceed two days and nights. Numbering, demolding. Immediately after dismantling the test piece, it shall be placed in a standard curing room with a temperature of (20 ± 2) ° C and relative humidity of 90% or more. During curing, the specimens should be spaced at least 10 mm apart from each other. The curing slurry specimens in a standard sand mixing room should be covered to prevent water from dripping onto the specimens.
★试件从养护地点取出后应及时进行试验。试验前将试件表面擦 试干净，测量尺寸，并检查其外观。并据此计算试件的承压面积，如 实测尺寸与公称尺寸之差不超过 1 ㎜，可按公称尺寸进行计算;
★将试件安放在试验机的下压板(或下垫板)上，试件的承压面应 与成型时的顶面垂直，试件中应与试验机下压板(或下垫板)中对 准。开动试验机，当上压板与试件(或上垫板)接近时，调整球座，使 接触面均衡受压。承压试验应连续而均匀地加荷，加荷速度应为每秒钟0.2kN～1.5kN(砂浆强度不大于 5Mpa 时，宜取下限，砂浆强度大 于 5Mpa 时，宜取上限)，当试件接近破坏而开始迅速变形时，停止 调整试验机油门，直至试件破坏，然后记录破坏荷载。
The compressive strength test of mortar cube specimens should be carried out according to the following steps: DYE-300 mortar pressure tester
★ The test specimen shall be tested in time after being taken out from the maintenance site. Before the test, wipe the surface of the test piece clean, measure the size, and check its appearance. The pressure bearing area of the test piece is calculated accordingly. If the difference between the measured size and the nominal size does not exceed 1 ㎜, it can be calculated according to the nominal size;
★ Place the test piece on the lower plate (or lower plate) of the testing machine. The pressure bearing surface of the test piece should be perpendicular to the top surface of the test machine. The test piece should be in the lower plate (or lower plate) of the test machine. alignment. Start the testing machine. When the upper pressure plate is close to the test piece (or upper plate), adjust the ball seat so that the contact surface is evenly pressed. The pressure test should be continuously and uniformly loaded, and the loading speed should be 0.2kN ～ 1.5kN per second (the lower limit should be taken when the mortar strength is not greater than 5Mpa, and the upper limit should be taken when the mortar strength is greater than 5Mpa) When approaching damage and start to deform rapidly, stop adjusting the tester throttle until the test piece is broken, and then record the damage load.
Fm，cu=Nu (9.0.5) A 式中 fm，cu_____砂浆立方体试件抗压强度(Mpa); NU_____试件破坏荷载(N); A_____试件承压面积(mm2) 砂浆立方体试件抗压强度应**至 0.1Mpa。 以三个试件测值的算术平均值为 1.3 倍(f2)作为该组试件的砂浆 立方体试件抗压强度平均值(**至 0.1Mpa)。 当三个测值的A大值或A小值中如有一个与中间值的差值超过 中间值的 15%时， 则把A大值及A小值一并舍除， 取中间值作为该** 试件的抗压强度值;如有两个测值与中间值的差值均超过中间值的 1 5%时，则该组试件的试验结果无效。
The compressive strength of the mortar cube of the mortar pressure tester shall be calculated as follows:
Fm, cu = Nu (9.0.5) where fm, cu_____ Mortar cube specimen compressive strength (Mpa); NU_____ specimen failure load (N); A_____ specimen pressure area (mm2) mortar cube The compressive strength of the test piece shall be ** to 0.1Mpa. Take the arithmetic mean of the measured values of the three specimens as 1.3 times (f2) as the average compressive strength of the mortar cube specimens of this group (** to 0.1Mpa). When the difference between the major A value or minor A value of the three measured values exceeds the intermediate value by more than 15%, the major A value and minor A value are divided together, and the median value is taken as the value. ** The compressive strength value of the test piece; if the difference between the two measured values and the intermediate value exceeds 15% of the intermediate value, the test results of this group of test pieces are invalid.