The main goal of this research is to investigate the type and form of wire mesh most effective in... more The main goal of this research is to investigate the type and form of wire mesh most effective in the load resistance less deflection possible by testing load deflection of the samples in the laboratory. The results showed that the ordinary mesh with square wholes most effectiveness in strengthen their loads. Which have higher strength percent with less deflection. The second goal from the research is studying the effect of palygoriskite adding by the optimum content with high range water reducing admixture on some mechanical properties of the ferrocement paste through curing period arrive to 28 days for some properties like (compressive strength , splitting tensile strength , flexural strength) , and mix proportions 1:2.5 with w/c equal to 0.45. The results showed that concrete containing high reactive palygoriskite 15% from cement weight with high rang water reducing admixture had improvement in (compressive strength , splitting tensile strength and flexural strength). Where the percentage of incresement was (31.5% , 55.1% , 108.4%) at 28 days in compressive strength , splitting tensile strength and flexural strength respectively with reference mix .
The present investigation was carried out to study the possibility of using waste glass of size u... more The present investigation was carried out to study the possibility of using waste glass of size up to 5mm as a fine aggregate in concrete and mortar. The waste glass was used as a partial weight replacement of sand with percentages of 10, 20, 30 and 40 %. The results have indicated that increasing the fractions of sand replacement by waste glass leads to reduce the compressive and tensile strength for both mortar and concrete. Up to 20 % replacement, the 28 days compressive strength of concrete and mortar is about 92 and 95 percent from the reference strengths, respectively. Also, it was found that the expansion of mortar specimens increase with increasing the waste glass content in the mix. At 20 % of sand replacement by waste glass, the expansion is slightly higher than that for the control specimens.
Magnesium hydroxide was used as flame inhibitor to increased flame resistance for tires .Magnesiu... more Magnesium hydroxide was used as flame inhibitor to increased flame resistance for tires .Magnesium hydroxide was adding with (5%,10%) weight percents to rubber master batch of tire and then exposed the resulting material to a flame generated from gas torch with (10 mm) exposure distance. Method of measuring the surface temperature opposite to the flame was used to determine the heat transferred through tire material. The results were obtained shows enhanced flame resistance for tire by added magnesium hydroxide and this resistance increased by increasing hydroxide Percentage .
This paper presents applying gene expression programming (GEP) approach for predicting the punchi... more This paper presents applying gene expression programming (GEP) approach for predicting the punching shear strength of normal and high strength reinforced concrete flat slabs. The GEP model was developed and verified using 58 case histories that involve measured punching shear strength. The modeling was carried out by dividing the data into two sets: a training set for model calibration, and a validation set for verifying the generalization capability of the model. It is shown that the model is able to learn with high accuracy the complex relationship between the punching shear and the factors affecting it and produces this knowledge in the form of a function. The results have demonstrated that the GEP model performs very well with coefficient of determination, mean, standard deviation and probability density at 50% equivalent to 0.98, 0.99, 0.10 and 0.99, respectively. Moreover, the GEP predicts punching shear strength more accurately than the traditional methods.
One of important problem in fine aggregate is the contaminated with interior sulfates in manufact... more One of important problem in fine aggregate is the contaminated with interior sulfates in manufacturing concrete in Iraq. Within standard specifications a difficult obtain of well-graded fine aggregate with sulfates content is existed. The present research is devoted to enhancement of some properties of self-compacting concrete with fine aggregate contains internal sulfates by partial replacement of gypsum to fine aggregate by weight. This study is bifurcate of self-compacting concrete they are: first category is incorporating powder of limestone (LSP) in self-compacting concrete and second one is incorporating 10% rise husk ash (RHA) plus powder of limestone (LSP). The investigated scales of fine aggregate with sulfates contents were (0.37%, 0.5%, 1.0%, and 1.5%) which is corresponding replacement by weight of cement equal of (3.74%, 3.99%, 4.96% and 5.93%) for mixes contained limestone powder and of (3.76%, 4.01%,4.98% and 5.96%) for mixes contains rise husk ash plus powder of limestone. Experimental program of this study is bifurcate; first one is using superplasticizers and fillers to produce self-compacting concrete then determine the workability. Second one is to evaluate the mechanical properties such as splitting tensile strength and compressive strength and. It was noticed that, the exemplary content of gypsum was by weight of cement for all mixes was 0.5%. While increase in compressive strength in a range between 5.9% and 10.1%, and in tensile strength in a range between 1.2% and 8.5% for mixes of self-compacting concrete with limestone powder plus rise husk ash instead of limestone powder.
One of the important problems in fine aggregate is the contaminated with interior sulfates in man... more One of the important problems in fine aggregate is the contaminated with interior sulfates in manufacturing concrete in Iraq. Within standard specifications a difficult to obtain of well-graded fine aggregate with sulfates content is existed. The present research is devoted to enhancement of some properties of self-compacting concrete with fine aggregate contains internal sulfates by partial replacement of gypsum to fine aggregate by weight. This study is bifurcate of self-compacting concrete they are: first category is incorporating powder of limestone (LSP) in self-compacting concrete and the second one is incorporating 10% rise husk ash (RHA) plus powder of limestone (LSP). The investigated scales of fine aggregate with sulfates contents were (0.37%, 0.5%, 1.0%, and 1.5%) which is corresponding replacement by weight of cement equal of (3.74%, 3.99%, 4.96% and 5.93%) for mixes contained limestone powder and of (3.76%, 4.01%,4.98% and 5.96%) for mixes contains rise husk ash plus powder of limestone. Experimental program of this study is bifurcate; first one is using superplasticizers and fillers to produce self-compacting concrete then determine the workability. Second one is to evaluate the mechanical properties such as splitting tensile strength and compressive strength. It was noticed that, the exemplary content of gypsum was by weight of cement for all mixes was 0.5%. While increase in compressive strength in a range between 5.9% and 10.1%, and in tensile strength in a range between 1.2% and 8.5% for mixes of self-compacting concrete with limestone powder plus rise husk ash instead of limestone powder.
The main goal of this research is to investigate the type and form of wire mesh most effective in... more The main goal of this research is to investigate the type and form of wire mesh most effective in the load resistance less deflection possible by testing load deflection of the samples in the laboratory. The results showed that the ordinary mesh with square wholes most effectiveness in strengthen their loads. Which have higher strength percent with less deflection. The second goal from the research is studying the effect of palygoriskite adding by the optimum content with high range water reducing admixture on some mechanical properties of the ferrocement paste through curing period arrive to 28 days for some properties like (compressive strength , splitting tensile strength , flexural strength) , and mix proportions 1:2.5 with w/c equal to 0.45. The results showed that concrete containing high reactive palygoriskite 15% from cement weight with high rang water reducing admixture had improvement in (compressive strength , splitting tensile strength and flexural strength). Where the percentage of incresement was (31.5% , 55.1% , 108.4%) at 28 days in compressive strength , splitting tensile strength and flexural strength respectively with reference mix .
The present investigation was carried out to study the possibility of using waste glass of size u... more The present investigation was carried out to study the possibility of using waste glass of size up to 5mm as a fine aggregate in concrete and mortar. The waste glass was used as a partial weight replacement of sand with percentages of 10, 20, 30 and 40 %. The results have indicated that increasing the fractions of sand replacement by waste glass leads to reduce the compressive and tensile strength for both mortar and concrete. Up to 20 % replacement, the 28 days compressive strength of concrete and mortar is about 92 and 95 percent from the reference strengths, respectively. Also, it was found that the expansion of mortar specimens increase with increasing the waste glass content in the mix. At 20 % of sand replacement by waste glass, the expansion is slightly higher than that for the control specimens.
Magnesium hydroxide was used as flame inhibitor to increased flame resistance for tires .Magnesiu... more Magnesium hydroxide was used as flame inhibitor to increased flame resistance for tires .Magnesium hydroxide was adding with (5%,10%) weight percents to rubber master batch of tire and then exposed the resulting material to a flame generated from gas torch with (10 mm) exposure distance. Method of measuring the surface temperature opposite to the flame was used to determine the heat transferred through tire material. The results were obtained shows enhanced flame resistance for tire by added magnesium hydroxide and this resistance increased by increasing hydroxide Percentage .
This paper presents applying gene expression programming (GEP) approach for predicting the punchi... more This paper presents applying gene expression programming (GEP) approach for predicting the punching shear strength of normal and high strength reinforced concrete flat slabs. The GEP model was developed and verified using 58 case histories that involve measured punching shear strength. The modeling was carried out by dividing the data into two sets: a training set for model calibration, and a validation set for verifying the generalization capability of the model. It is shown that the model is able to learn with high accuracy the complex relationship between the punching shear and the factors affecting it and produces this knowledge in the form of a function. The results have demonstrated that the GEP model performs very well with coefficient of determination, mean, standard deviation and probability density at 50% equivalent to 0.98, 0.99, 0.10 and 0.99, respectively. Moreover, the GEP predicts punching shear strength more accurately than the traditional methods.
One of important problem in fine aggregate is the contaminated with interior sulfates in manufact... more One of important problem in fine aggregate is the contaminated with interior sulfates in manufacturing concrete in Iraq. Within standard specifications a difficult obtain of well-graded fine aggregate with sulfates content is existed. The present research is devoted to enhancement of some properties of self-compacting concrete with fine aggregate contains internal sulfates by partial replacement of gypsum to fine aggregate by weight. This study is bifurcate of self-compacting concrete they are: first category is incorporating powder of limestone (LSP) in self-compacting concrete and second one is incorporating 10% rise husk ash (RHA) plus powder of limestone (LSP). The investigated scales of fine aggregate with sulfates contents were (0.37%, 0.5%, 1.0%, and 1.5%) which is corresponding replacement by weight of cement equal of (3.74%, 3.99%, 4.96% and 5.93%) for mixes contained limestone powder and of (3.76%, 4.01%,4.98% and 5.96%) for mixes contains rise husk ash plus powder of limestone. Experimental program of this study is bifurcate; first one is using superplasticizers and fillers to produce self-compacting concrete then determine the workability. Second one is to evaluate the mechanical properties such as splitting tensile strength and compressive strength and. It was noticed that, the exemplary content of gypsum was by weight of cement for all mixes was 0.5%. While increase in compressive strength in a range between 5.9% and 10.1%, and in tensile strength in a range between 1.2% and 8.5% for mixes of self-compacting concrete with limestone powder plus rise husk ash instead of limestone powder.
One of the important problems in fine aggregate is the contaminated with interior sulfates in man... more One of the important problems in fine aggregate is the contaminated with interior sulfates in manufacturing concrete in Iraq. Within standard specifications a difficult to obtain of well-graded fine aggregate with sulfates content is existed. The present research is devoted to enhancement of some properties of self-compacting concrete with fine aggregate contains internal sulfates by partial replacement of gypsum to fine aggregate by weight. This study is bifurcate of self-compacting concrete they are: first category is incorporating powder of limestone (LSP) in self-compacting concrete and the second one is incorporating 10% rise husk ash (RHA) plus powder of limestone (LSP). The investigated scales of fine aggregate with sulfates contents were (0.37%, 0.5%, 1.0%, and 1.5%) which is corresponding replacement by weight of cement equal of (3.74%, 3.99%, 4.96% and 5.93%) for mixes contained limestone powder and of (3.76%, 4.01%,4.98% and 5.96%) for mixes contains rise husk ash plus powder of limestone. Experimental program of this study is bifurcate; first one is using superplasticizers and fillers to produce self-compacting concrete then determine the workability. Second one is to evaluate the mechanical properties such as splitting tensile strength and compressive strength. It was noticed that, the exemplary content of gypsum was by weight of cement for all mixes was 0.5%. While increase in compressive strength in a range between 5.9% and 10.1%, and in tensile strength in a range between 1.2% and 8.5% for mixes of self-compacting concrete with limestone powder plus rise husk ash instead of limestone powder.
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