To solve concrete bleb and exterior quality, we undertook this the technology tackles key problem experiment with the technology, main content is the dosage that passes cement and fly ash, density and water requirement (than) computation decides the computation of optimal water consumption in home remedy concrete method, the computational method of volume of body of gel material oar, the adjustment that additive mix into measures method. Of arenaceous stone aggregate detect the calculation that method and design use technical parameter.
This second experiment is with the raw material of the spot accurate, listed a kind of sand and 3 kinds of measurement of cobble data and formula of calculative of arenaceous stone aggregate and measure. Undertake be operatinged actually grooming to lab next, undertook metrical to 3 kinds of cobble above all, basically master the measurement technique of cobble accumulation density, interstitial rate and bibulous rate, and the computational method of apparent density.
Undertook metrical to a kind of sand, advocate the basis that if master sand,density of close together accumulation measures pressure to be worth 72KN to decide, process that uses compressor test, define the measurement technique of the rate that contain stone with 4.75 millimeter bolt. When making up concrete, mastered pressure the course that bibulous law determines sand water consumption. Undertake be operatinged actually detecting next arenaceous stone, detect according to arenaceous stone the parameter that come out, use a number to quantify concrete to cooperate to undertake assorted to compare adjustment calculation than devising a method, get two groups are used different the C30 of arenaceous stone, c50 concrete cooperates to compare. Differ in the light of 2 groups cooperate to compare, undertake quantity of additive mix into adjusts an experiment first, undertake assorted test having a competition next, the effect is first-rate, realized a dish to make decided target.
01
The measurement of sand (the arenaceous rock that takes with Tianjin is exemple)
1, arenaceous measurement
According to spot circumstance, go to the lavatory for computation, the density of close together accumulation of preliminary and affirmatory sand takes a cost 1844, the rate that contain stone takes a cost 10% , bibulous rate takes pressure value 7% .
2, the measurement of cobble
02
C30 cooperates to compare adjust
1, adjust a purpose
First wife adds up to material of the gel in comparing to be: Cement 331 Kg, water requirement 28.2, density 3140 Kg/m3; Fly ash 59 Kg, density 2200 Kg/m3, , water requirement is compared 1.02; Mix into measures the additive after adjusting 1.3%% . Cobble uses 4, by 1, 2, 3 3 kinds of cobble according to 2: 5: 3 mix 4 formation cobble.
2, the computation of gel material bulk
= 331/3140+59/2200 = 0.132 M3 of V gel material;
3, the computation of gel material water consumption
= 331*0.282+59*0.282*1.02 = 110kg of water consumption of W gel material;
W gel material mixes add up to water consumption = 110*2/3+110*1/3* (2- (331+59) / 300) = 99
4, coagulate material mixes the computation that combines water consumption bulk
V gel material mixes =99/1000 = 0.099m3 of bulk of operable water quantity
5, the computation of volume of body of gel material oar
= 0.132+0.099 = 0.231m3 of volume of body of oar of V gel material
6, sand dosage and water consumption
S sand dosage = 1844*42.3%/(1-0.10) = 867kg
= 867*0.07 = 61kg of W sand water consumption
7, cobble dosage and water consumption
G cobble dosage = (1-0.231-0.423)*2669 = 923kg
= 923*2.7% = 25kg of W cobble water consumption
8, aggregate water consumption
= 61+25 = 86kg of water consumption of aggregate of W arenaceous stone
9, after adjusting cooperate to compare
03
C50 cooperates to compare adjust
1, adjust a purpose
First wife adds up to material of the gel in comparing to be: Cement 447 Kg, water requirement 28.2, density 3140 Kg/m3; Fly ash 50 Kg, density 2200 Kg/m3, water requirement is compared 1.02; Mix into measures the additive after adjusting 1.5% , cobble is used 1, 3 according to 25:75 mix 5 formation cobble.
2, the computation of gel material bulk
=447/3140+50/2200 = 0.155 M3 of V gel material;
3, the computation of gel material water consumption
= 447*0.282+50*0.282*1.02 =140kg of water consumption of W gel material;
W gel material mixes add up to water consumption = 140*2/3+140*1/3* (2- (447+50) / 300) = 109
4, coagulate material mixes the computation that combines water consumption bulk
V gel material mixes = 109/1000 = 0.109m3 of bulk of operable water quantity
5, the computation of volume of body of gel material oar
= 0.155+0.109 = 0.274m3 of volume of body of oar of V gel material
6, sand dosage and water consumption
S sand dosage = 1844*43.4%/(1-0.10) = 887kg
= 887*0.07 = 62kg of W sand water consumption
7, cobble dosage and water consumption
G cobble dosage = (1-0.274-0.434)*2694 =787kg
= 787*2.7% = 25kg of W cobble water consumption
8, aggregate water consumption
= 62+25 = 87kg of water consumption of aggregate of W arenaceous stone
9, after adjusting cooperate to compare
04
Try match
Cooperate to compare according to the spot is measured and adjusting calculation, the data on in order to undertakes adoption beforehand wet aggregate craft undertakes trying matching, two dishes of concrete try entirely deserve to succeed, solved concrete separation, catch the ground and gather up the difficult problem of the bottom. Because cooperate to compare reasonable, agitate stops to be able to realize do as one pleases to make the same score in mixer, discharge velocity of flow is smooth, mix luster of surface closing matter, the coping after stopping flow does not have the phenomenon that cobble appears, with scoop shovel concrete mixes close matter very light, the fluidity of oar body itself is very good.
Be aimed at this mark paragraph 3 kinds of bleb that exist in concrete project, cement grinding aid takes those who be less than 2mm, in this project less, need not use a consideration; Additive takes the round bubble that is more than 2mm, basically solve through dropping the agent leading energy of life in additive, had asked to additive factory; And elliptic irregular perhaps blemish belongs to bleb, because decrease water agent to decrease water,basically be rate is insufficient and arenaceous stone is bibulous cause, pass in trying the course that match beforehand wet aggregate technology eliminates arenaceous stone aggregate bibulous the bleb that cause, proposal lab director is passed perfect brace up the bleb that pounds craft to perhaps raise the rate that decrease water to solve additive to decrease water rate to be caused not high.
In this second experiment process, the test and verify in doing gel material and additive to adjust the process of the experiment additive decreases water to lead amiable bubble to flow in clean oar of compound gel material patulous degree mix with concrete close have between content one to one correspondence relation, the optimal mix into that can consider to pass experiment of clean oar flow to control additive in quality control process so estimates the amount of amiable bubble.
