Let's do some basic math, shall we?
How much, exactly, is "1% by weight"?
And are we considering the weight of the fresh, moist mud brick or the fully dried mud brick?
Let's assume it's dried brick... I looked up the dry weight of clay and sand (the main components of mud bricks) and even took the lighter end of the range at 15 kN/m3.
That is a weight of 1529.6 kilograms per cubic meter, if the entire brick is dry and does not contain any straw.
If we assume a size of one brick at 33x20x10 cm you can fit 15 bricks into 1m3 and the m3 would yield 150 bricks.
If I want to replace 1% of that weight with straw, how much would that be?
1% of 1529... I'd have to add about 15 kilograms of straw per cubic meter or 150 bricks, right?
Well, a handy list for farmers, helping with volume calculations for feed and bedding, tells me that 1m3 of loose straw weighs about 40 kilograms, so I will need about 1/3 of this volume to get to 15kg of straw. 0.33 m3
A nice, large round basket of 60cm diameter and 40cm height has a volume of 0.11 m3
Conclusion: to make 150 mud bricks that contain only "1% in weight" of straw as tempering... Still requires 3 large baskets of straw that needs to be gathered, transported and cut into small bits.
(And that's if we're calculating with the most generous estimates of the given material)
Just saying.
I mean, I don't think any of your "exodus from India" arguments are very strong, but even this one does not turn out to work very well.
So straw is fuel in making burnt baked bricks.
@Tamino I'm looking forward to what
@Bharat Jhunjhunwala will say about this as you asked detailed questions.
Meanwhile, I'll also further research. Because I want to.
After this post: I'll be looking further to your questions
@Tamino
@Bharat Jhunjhunwala
Maybe my question isn't a question due to straw being the fuel in making burnt baked bricks. So no straw in brick then due to straw is fuel?
I'll ask anyways. As I'm researching bricks further.
Does straw help burn these bricks compared to other ways to burn bricks? Can other ways of making bricks also be called burnt-bake bricks, or only an amount of straw is needed to qualify for this name, burnt-bake bricks?
If Egypt has lots of stones, did this cause no need to make lots of bricks due to already having stone to build from, and that Indus Valley doesn't have much stone, but look at all the mountains? So these mountains in Indus Valley don't have hardly any stones, really. What are mountains made of in Indus Valley, and how does one grow plant fiber in the mountain area to even gather lots of straw later? Wouldn't it be better to grow plants on flat lands?
The amount of straw was before burning? So 50% of straw is before burning?
After this post: I'll be looking further to your questions @Tamino
Indus Valley: Exodus of Adam, Noah, Abraham and Moses: Biblical scholars mostly believe that the Exodus took place from Egypt. James K. Hoffmeier has provided evidence for the same
www.commonprophets.com
Straw is used as a binding substance in the making of mud bricks and as fuel in making baked bricks. The Biblical Archaeology Society Staff says that only 0.6 per cent straw by weight is added as a binder in making mud bricks.
[6] In comparison, my discussions with brick kiln owners in India indicate that about one-half of the cost of production of making baked bricks consists of straw.
Mud bricks made in Egypt “rarely added straw temper,” and baked bricks were used only sparingly.
[7] In comparison, baked bricks were the main construction material in the Indus Valley, including at the site of Chanhu Daro, which we suggest was the Biblical Mitsrayim.
[8] The conflict over collection of straw is, therefore, more likely to have happened in the Indus Valley. The baked bricks made here required large amounts of straw.