CN2244723Y - Apparatus for testing cement density - Google Patents

Abstract

The utility model discloses an apparatus for testing cement density, composed of a testing bottle (1), a titration pipe (2), a stirrer (3), a magnetic stirrer (4) and a titration frame (5). Scales with numbers gradually increasingare engraved on the testing bottle (1) from bottom to top, scales with numbers gradually increasing from zero are engraved on the titration pipe (2) from top to bottom, the stirrer (3) can be arranged in the testing bottle (1), the titration pipe (2) can be fixed on the titration frame (5), and the testing bottle (1) is arranged on the magnetic stirrer (4). The utility model has the advantages of low equipment cost, simple operation and high testing precision, the tested absolute error of the utility model only is 0.01.

Description

Measure the device of cement density

The utility model relates to a kind of device of measuring cement density.

Cement density is an important physical index of cement, all wants often the density of cement to be measured in the process of production and use cement.At present, for the higher occasion of accuracy requirement, the method of measuring cement density mostly adopts the gas displacement process, though the gas displacement process has advantage accurately and rapidly, in use, must adopt 1305 type density instrument to measure, also require to use highly purified helium simultaneously, because complex structure, the cost height of this density instrument, and highly purified helium production cost is also higher, so adopt the shortcoming of this method to be: expense height, operation easier are bigger.

The purpose of this utility model is: a kind of simple to operate, cheap, device of measuring the higher mensuration cement density of precision is provided.

The utility model is to constitute like this: it is made up of volumetric flask (1), buret (2), stirrer (3), magnetic stirring apparatus (4), titration stand (5), on volumetric flask (1), be carved with the scale that numeral increases from down to up gradually, on buret (2), be carved with from top to bottom numeral by zero to big scale, stirrer (3) can be put into volumetric flask (1), buret (2) can be fixed on the titration stand (5), and volumetric flask (1) is placed on the magnetic stirring apparatus (4).During use, to have the cement sample of certain mass W and stirrer (3) that volume is V3 earlier and put into volumetric flask (1), buret (2) is fixed on the titration stand (5), suck a certain amount of anhydrous kerosene till zero graduation with buret (2), the part kerosene that sucks is joined in the volumetric flask (1), up to can be till seeing kerosene on the scale of volumetric flask (1), volumetric flask (1) is placed on the magnetic stirring apparatus (4), connect the power supply of magnetic stirring apparatus (4), with cement and the kerosene mixing and stirring in the volumetric flask (1), bubble in volumetric flask (1) is all discharged, if at this moment the mixing kerosene face in the volumetric flask (1) is lower than the scale on the volumetric flask (1), then continue the kerosene in the buret (2) is joined in the volumetric flask (1), till the mixing kerosin volume that can in the scale of volumetric flask (1), show in the bottle outlet, if the volume scale of the mixed solution of reading on volumetric flask (1) is V1, then kerosene volume wherein just can directly be read on the scale mark on the buret (2) and be V2, like this density p of cement just routinely formula calculate: $\mathrm{\ρ}=\frac{W}{V1-V2-V3}$ The unit that is calculated in the formula is: g/cm ³

The utility model compared with prior art owing to only used several making to be easy to other parts, so equipment is with low cost, and simple to operate, and the standard deviation of its mensuration is 0.0019, and extreme difference is 0.0046, if revision of the convention two-decimal, its absolute error only are 0.01.

Accompanying drawing 1 is a synoptic diagram of the present utility model;

Embodiments of the invention: the volume of stirrer (3) is made 0.70cm ³, magnetic stirring apparatus (4) adopts finished product of the prior art, on volumetric flask (1), engrave the scale that numeral increases from down to up gradually, promptly by 120ml～125ml, on buret (2), engrave digital from top to bottom by zero scale to 122ml, stirrer (3) is put into volumetric flask (1), buret (2) can be fixed on the titration stand (5), and volumetric flask (1) is placed on magnetic stirring apparatus (4) and goes up.Before measuring cement density, in order to reduce the systematic error of instrument, require the scale on buret and the volumetric flask is proofreaded, during check and correction, anhydrous kerosene is packed in the buret, and, the kerosene in the buret is put into volumetric flask to good zero point, between 120～122 scale marks, kerosene should be the same at buret and scale reading in the volumetric flask, if error then is as the criterion with the scale on the buret, and the scale of marked capacity bottle again.When measuring cement density, it is oven dry and being chilled at drying cooling device about cement sample 50.1020 grams (being accurate to 0.001 gram) of room temperature under 5 ℃ of temperature that first standard takes by weighing 110 ℃ of deviations, and is 0.70cm with itself and volume ³Stirrer (3) put into volumetric flask (1) with scale, suck anhydrous kerosene to 122 scale mark with buret (2), the part kerosene that will suck again joins in the volumetric flask (1) and arrives scale mark about 122, volumetric flask (1) is placed on the magnetic stirring apparatus (4), with cement and kerosene mixing and stirring, bubble in volumetric flask (1) is all discharged, when the mixing kerosene face in the volumetric flask (1) is lower than 120 scale marks on the volumetric flask (1), then continue the kerosene in the buret (2) is joined in the volumetric flask (1), till it reaches about 120 scale marks of volumetric flask (1), if at this moment the reading of the mixed solution volume in the volumetric flask (1) is 120.55ml, the kerosene volume V2 that then puts in the buret (2) in the volumetric flask (1) just is 103.44ml, like this density p of cement just routinely formula calculate: $\mathrm{\ρ}=\frac{50.1020}{120.55-103.44-0.7}=3.0531(g/{\mathrm{cm}}^3)$ 。

Claims (1)

1, a kind of device of measuring cement density, it is characterized in that: it is made up of volumetric flask (1), buret (2), stirrer (3), magnetic stirring apparatus (4), titration stand (5), on volumetric flask (1), be carved with the scale that numeral increases from down to up gradually, on buret (2), be carved with from top to bottom numeral by zero to big scale, stirrer (3) can be put into volumetric flask (1), buret (2) can be fixed on the titration stand (5), and volumetric flask (1) is placed on the magnetic stirring apparatus (4).